diff --git a/Gemfile b/Gemfile
index a80f23dbc0f..6c72e48bab4 100644
--- a/Gemfile
+++ b/Gemfile
@@ -127,6 +127,10 @@ gem 'mini_racer'
 # TODO: determine why highline is being held back and upgrade to latest
 gem 'highline', '~> 1.7.0', require: false
 
+# TODO: Upgrading breaks Sidekiq Web
+# This is a bit of a hornets nest cause in an ideal world we much prefer
+# if Sidekiq reused session and CSRF mitigation with Discourse on the
+# _forum_session cookie instead of a rack.session cookie
 gem 'rack', '2.2.2'
 
 gem 'rack-protection' # security
@@ -248,5 +252,3 @@ end
 gem 'webpush', require: false
 gem 'colored2', require: false
 gem 'maxminddb'
-
-gem 'rails_failover', require: false
diff --git a/Gemfile.lock b/Gemfile.lock
index db4b88d8631..752d48c3c90 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -195,7 +195,7 @@ GEM
     mini_sql (0.2.5)
     mini_suffix (0.3.0)
       ffi (~> 1.9)
-    minitest (5.14.1)
+    minitest (5.14.0)
     mocha (1.11.2)
     mock_redis (0.23.0)
     msgpack (1.3.3)
@@ -262,7 +262,7 @@ GEM
     pry-rails (0.3.9)
       pry (>= 0.10.4)
     public_suffix (4.0.5)
-    puma (4.3.5)
+    puma (4.3.3)
       nio4r (~> 2.0)
     r2 (0.2.7)
     rack (2.2.2)
@@ -277,8 +277,6 @@ GEM
       nokogiri (>= 1.6)
     rails-html-sanitizer (1.3.0)
       loofah (~> 2.3)
-    rails_failover (0.2.0)
-      redis (~> 4)
     rails_multisite (2.1.2)
       activerecord (> 5.0, < 7)
       railties (> 5.0, < 7)
@@ -296,7 +294,7 @@ GEM
     rb-fsevent (0.10.4)
     rb-inotify (0.10.1)
       ffi (~> 1.0)
-    rbtrace (0.4.13)
+    rbtrace (0.4.12)
       ffi (>= 1.0.6)
       msgpack (>= 0.4.3)
       optimist (>= 3.0.0)
@@ -343,16 +341,13 @@ GEM
       json-schema (~> 2.2)
       railties (>= 3.1, < 7.0)
     rtlit (0.0.5)
-    rubocop (0.84.0)
+    rubocop (0.83.0)
       parallel (~> 1.10)
       parser (>= 2.7.0.1)
       rainbow (>= 2.2.2, < 4.0)
       rexml
-      rubocop-ast (>= 0.0.3)
       ruby-progressbar (~> 1.7)
       unicode-display_width (>= 1.4.0, < 2.0)
-    rubocop-ast (0.0.3)
-      parser (>= 2.7.0.1)
     rubocop-discourse (2.1.2)
       rubocop (>= 0.69.0)
       rubocop-rspec (>= 1.39.0)
@@ -514,7 +509,6 @@ DEPENDENCIES
   rack (= 2.2.2)
   rack-mini-profiler
   rack-protection
-  rails_failover
   rails_multisite
   railties (= 6.0.3)
   rake
diff --git a/app/assets/javascripts/admin/models/admin-user.js b/app/assets/javascripts/admin/models/admin-user.js
index 9977fa8dd46..71b8078f6ed 100644
--- a/app/assets/javascripts/admin/models/admin-user.js
+++ b/app/assets/javascripts/admin/models/admin-user.js
@@ -77,6 +77,12 @@ const AdminUser = User.extend({
     });
   },
 
+  revokeApiKey() {
+    return ajax(`/admin/users/${this.id}/revoke_api_key`, {
+      type: "DELETE"
+    }).then(() => this.set("api_key", null));
+  },
+
   deleteAllPosts() {
     let deletedPosts = 0;
     const user = this;
diff --git a/app/assets/javascripts/admin/routes/admin-web-hooks-show.js b/app/assets/javascripts/admin/routes/admin-web-hooks-show.js
index f0860e79f71..34aed775cc5 100644
--- a/app/assets/javascripts/admin/routes/admin-web-hooks-show.js
+++ b/app/assets/javascripts/admin/routes/admin-web-hooks-show.js
@@ -1,4 +1,5 @@
 import { get } from "@ember/object";
+import { isEmpty } from "@ember/utils";
 import DiscourseRoute from "discourse/routes/discourse";
 
 export default DiscourseRoute.extend({
@@ -14,7 +15,7 @@ export default DiscourseRoute.extend({
   },
 
   setupController(controller, model) {
-    if (model.get("isNew")) {
+    if (model.get("isNew") || isEmpty(model.get("web_hook_event_types"))) {
       model.set("web_hook_event_types", controller.get("defaultEventTypes"));
     }
 
diff --git a/app/assets/javascripts/application.js b/app/assets/javascripts/application.js
index 40f1d275bb4..4445fd79869 100644
--- a/app/assets/javascripts/application.js
+++ b/app/assets/javascripts/application.js
@@ -1,6 +1,6 @@
 //= require_tree ./discourse-common/addon
 //= require ./polyfills
-//= require_tree ./select-kit/addon
+//= require_tree ./select-kit/app
 //= require ./discourse/app/app
 //= require ./app-boot
 
diff --git a/app/assets/javascripts/discourse-loader.js b/app/assets/javascripts/discourse-loader.js
index fc829ae12f0..d11217a985a 100644
--- a/app/assets/javascripts/discourse-loader.js
+++ b/app/assets/javascripts/discourse-loader.js
@@ -36,6 +36,7 @@ var define, requirejs;
         default: Ember.Object,
         get: Ember.get,
         getProperties: Ember.getProperties,
+        guidFor: Ember.guidFor,
         set: Ember.set,
         setProperties: Ember.setProperties,
         computed: Ember.computed,
diff --git a/app/assets/javascripts/discourse/app/controllers/preferences/interface.js b/app/assets/javascripts/discourse/app/controllers/preferences/interface.js
index 2fcc5781c30..1ad85b7d7b1 100644
--- a/app/assets/javascripts/discourse/app/controllers/preferences/interface.js
+++ b/app/assets/javascripts/discourse/app/controllers/preferences/interface.js
@@ -2,10 +2,13 @@ import I18n from "I18n";
 import { inject } from "@ember/controller";
 import Controller from "@ember/controller";
 import { setDefaultHomepage } from "discourse/lib/utilities";
-import discourseComputed from "discourse-common/utils/decorators";
-import { listThemes, setLocalTheme } from "discourse/lib/theme-selector";
+import discourseComputed, { observes } from "discourse-common/utils/decorators";
+import {
+  listThemes,
+  previewTheme,
+  setLocalTheme
+} from "discourse/lib/theme-selector";
 import { popupAjaxError } from "discourse/lib/ajax-error";
-import pageReloader from "discourse/helpers/page-reloader";
 import {
   safariHacksDisabled,
   isiPad,
@@ -25,9 +28,6 @@ const TEXT_SIZES = ["smaller", "normal", "larger", "largest"];
 const TITLE_COUNT_MODES = ["notifications", "contextual"];
 
 export default Controller.extend({
-  currentThemeId: -1,
-  preferencesController: inject("preferences"),
-
   @discourseComputed("makeThemeDefault")
   saveAttrNames(makeDefault) {
     let attrs = [
@@ -51,6 +51,8 @@ export default Controller.extend({
     return attrs;
   },
 
+  preferencesController: inject("preferences"),
+
   @discourseComputed()
   isiPad() {
     // TODO: remove this preference checkbox when iOS adoption > 90%
@@ -103,14 +105,10 @@ export default Controller.extend({
     return themes && themes.length > 1;
   },
 
-  @discourseComputed("themeId")
-  themeIdChanged(themeId) {
-    if (this.currentThemeId === -1) {
-      this.set("currentThemeId", themeId);
-      return false;
-    } else {
-      return this.currentThemeId !== themeId;
-    }
+  @observes("themeId")
+  themeIdChanged() {
+    const id = this.themeId;
+    previewTheme([id]);
   },
 
   @discourseComputed("model.user_option.theme_ids", "themeId")
@@ -191,10 +189,6 @@ export default Controller.extend({
               this.disableSafariHacks.toString()
             );
           }
-
-          if (this.themeId !== this.currentThemeId) {
-            pageReloader.reload();
-          }
         })
         .catch(popupAjaxError);
     },
diff --git a/app/assets/javascripts/discourse/app/controllers/topic.js b/app/assets/javascripts/discourse/app/controllers/topic.js
index ba7caf554d1..2c2ebdc7fe6 100644
--- a/app/assets/javascripts/discourse/app/controllers/topic.js
+++ b/app/assets/javascripts/discourse/app/controllers/topic.js
@@ -185,13 +185,6 @@ export default Controller.extend(bufferedProperty("model"), {
     );
   },
 
-  @discourseComputed("model.category")
-  minimumRequiredTags(category) {
-    return category && category.minimum_required_tags > 0
-      ? category.minimum_required_tags
-      : null;
-  },
-
   _forceRefreshPostStream() {
     this.appEvents.trigger("post-stream:refresh", { force: true });
   },
diff --git a/app/assets/javascripts/discourse/app/controllers/user.js b/app/assets/javascripts/discourse/app/controllers/user.js
index b466f084ed5..cc2db042fbf 100644
--- a/app/assets/javascripts/discourse/app/controllers/user.js
+++ b/app/assets/javascripts/discourse/app/controllers/user.js
@@ -51,15 +51,13 @@ export default Controller.extend(CanCheckEmails, {
   hasDeletedPosts: gt("model.number_of_deleted_posts", 0),
   hasBeenSuspended: gt("model.number_of_suspensions", 0),
   hasReceivedWarnings: gt("model.warnings_received_count", 0),
-  hasRejectedPosts: gt("model.number_of_rejected_posts", 0),
 
   showStaffCounters: or(
     "hasGivenFlags",
     "hasFlaggedPosts",
     "hasDeletedPosts",
     "hasBeenSuspended",
-    "hasReceivedWarnings",
-    "hasRejectedPosts"
+    "hasReceivedWarnings"
   ),
 
   showFeaturedTopic: and(
diff --git a/app/assets/javascripts/discourse/app/helpers/page-reloader.js b/app/assets/javascripts/discourse/app/helpers/page-reloader.js
deleted file mode 100644
index 6429be3a3cc..00000000000
--- a/app/assets/javascripts/discourse/app/helpers/page-reloader.js
+++ /dev/null
@@ -1,10 +0,0 @@
-import EmberObject from "@ember/object";
-import Ember from "ember";
-
-export default EmberObject.create({
-  reload: function() {
-    if (!Ember.testing) {
-      location.reload();
-    }
-  }
-});
diff --git a/app/assets/javascripts/discourse/app/initializers/copy-codeblocks.js b/app/assets/javascripts/discourse/app/initializers/copy-codeblocks.js
index f6fcef5e17e..a0b0d509621 100644
--- a/app/assets/javascripts/discourse/app/initializers/copy-codeblocks.js
+++ b/app/assets/javascripts/discourse/app/initializers/copy-codeblocks.js
@@ -3,7 +3,6 @@ import { cancel, later } from "@ember/runloop";
 import { Promise } from "rsvp";
 import { iconHTML } from "discourse-common/lib/icon-library";
 import I18n from "I18n";
-import { guidFor } from "@ember/object/internals";
 
 // http://github.com/feross/clipboard-copy
 function clipboardCopy(text) {
@@ -91,7 +90,7 @@ export default {
             const state = button.innerHTML;
             button.innerHTML = I18n.t("copy_codeblock.copied");
 
-            const commandId = guidFor(button);
+            const commandId = Ember.guidFor(button);
 
             if (_fadeCopyCodeblocksRunners[commandId]) {
               cancel(_fadeCopyCodeblocksRunners[commandId]);
diff --git a/app/assets/javascripts/discourse/app/initializers/topic-footer-buttons.js b/app/assets/javascripts/discourse/app/initializers/topic-footer-buttons.js
index a2de76d3e9d..a13ccd2219f 100644
--- a/app/assets/javascripts/discourse/app/initializers/topic-footer-buttons.js
+++ b/app/assets/javascripts/discourse/app/initializers/topic-footer-buttons.js
@@ -3,13 +3,6 @@ import showModal from "discourse/lib/show-modal";
 import { registerTopicFooterButton } from "discourse/lib/register-topic-footer-button";
 import { formattedReminderTime } from "discourse/lib/bookmark";
 
-const SHARE_PRIORITY = 1000;
-const BOOKMARK_PRIORITY = 900;
-const ARCHIVE_PRIORITY = 800;
-const FLAG_PRIORITY = 700;
-const EDIT_MESSAGE_PRIORITY = 600;
-const DEFER_PRIORITY = 500;
-
 export default {
   name: "topic-footer-buttons",
 
@@ -18,12 +11,8 @@ export default {
     registerTopicFooterButton({
       id: "share-and-invite",
       icon: "link",
-      priority: SHARE_PRIORITY,
-      label() {
-        if (!this.get("topic.isPrivateMessage") || this.site.mobileView) {
-          return "topic.share.title";
-        }
-      },
+      priority: 999,
+      label: "topic.share.title",
       title: "topic.share.help",
       action() {
         const panels = [
@@ -78,7 +67,7 @@ export default {
     registerTopicFooterButton({
       id: "flag",
       icon: "flag",
-      priority: FLAG_PRIORITY,
+      priority: 998,
       label: "topic.flag_topic.title",
       title: "topic.flag_topic.help",
       action: "showFlagTopic",
@@ -104,16 +93,14 @@ export default {
         }
         return "bookmark";
       },
-      priority: BOOKMARK_PRIORITY,
+      priority: 1000,
       classNames() {
         const bookmarked = this.get("topic.bookmarked");
         return bookmarked ? ["bookmark", "bookmarked"] : ["bookmark"];
       },
       label() {
-        if (!this.get("topic.isPrivateMessage") || this.site.mobileView) {
-          const bookmarked = this.get("topic.bookmarked");
-          return bookmarked ? "bookmarked.clear_bookmarks" : "bookmarked.title";
-        }
+        const bookmarked = this.get("topic.bookmarked");
+        return bookmarked ? "bookmarked.clear_bookmarks" : "bookmarked.title";
       },
       translatedTitle() {
         const bookmarked = this.get("topic.bookmarked");
@@ -139,7 +126,7 @@ export default {
 
     registerTopicFooterButton({
       id: "archive",
-      priority: ARCHIVE_PRIORITY,
+      priority: 996,
       icon() {
         return this.archiveIcon;
       },
@@ -168,16 +155,13 @@ export default {
 
     registerTopicFooterButton({
       id: "edit-message",
-      priority: EDIT_MESSAGE_PRIORITY,
+      priority: 750,
       icon: "pencil-alt",
       label: "topic.edit_message.title",
       title: "topic.edit_message.help",
       action: "editFirstPost",
       classNames: ["edit-message"],
       dependentKeys: ["editFirstPost", "showEditOnFooter"],
-      dropdown() {
-        return this.site.mobileView && this.get("topic.isPrivateMessage");
-      },
       displayed() {
         return this.showEditOnFooter;
       }
@@ -186,7 +170,7 @@ export default {
     registerTopicFooterButton({
       id: "defer",
       icon: "circle",
-      priority: DEFER_PRIORITY,
+      priority: 300,
       label: "topic.defer.title",
       title: "topic.defer.help",
       action: "deferTopic",
diff --git a/app/assets/javascripts/discourse/app/lib/theme-selector.js b/app/assets/javascripts/discourse/app/lib/theme-selector.js
index 48f63c31fbf..9d293fe312c 100644
--- a/app/assets/javascripts/discourse/app/lib/theme-selector.js
+++ b/app/assets/javascripts/discourse/app/lib/theme-selector.js
@@ -1,4 +1,5 @@
 import I18n from "I18n";
+import { ajax } from "discourse/lib/ajax";
 import deprecated from "discourse-common/lib/deprecated";
 
 const keySelector = "meta[name=discourse_theme_ids]";
@@ -78,6 +79,31 @@ export function refreshCSS(node, hash, newHref) {
   $orig.data("copy", reloaded);
 }
 
+export function previewTheme(ids = []) {
+  ids = ids.reject(id => !id);
+  if (!ids.includes(currentThemeId())) {
+    Discourse.set("assetVersion", "forceRefresh");
+
+    ajax(`/themes/assets/${ids.length > 0 ? ids.join("-") : "default"}`).then(
+      results => {
+        const elem = _.first($(keySelector));
+        if (elem) {
+          elem.content = ids.join(",");
+        }
+
+        results.themes.forEach(theme => {
+          const node = $(
+            `link[rel=stylesheet][data-target=${theme.target}]`
+          )[0];
+          if (node) {
+            refreshCSS(node, null, theme.new_href);
+          }
+        });
+      }
+    );
+  }
+}
+
 export function listThemes(site) {
   let themes = site.get("user_themes");
 
diff --git a/app/assets/javascripts/discourse/app/models/nav-item.js b/app/assets/javascripts/discourse/app/models/nav-item.js
index 955e536e1eb..412cd8ec2e4 100644
--- a/app/assets/javascripts/discourse/app/models/nav-item.js
+++ b/app/assets/javascripts/discourse/app/models/nav-item.js
@@ -273,17 +273,12 @@ export function addNavItem(item) {
   NavItem.extraNavItemDescriptors.push(item);
 }
 
-if (typeof Discourse !== "undefined") {
-  Object.defineProperty(Discourse, "NavItem", {
-    get() {
-      deprecated(
-        "Import the NavItem class instead of using Discourse.NavItem",
-        {
-          since: "2.4.0",
-          dropFrom: "2.5.0"
-        }
-      );
-      return NavItem;
-    }
-  });
-}
+Object.defineProperty(Discourse, "NavItem", {
+  get() {
+    deprecated("Import the NavItem class instead of using Discourse.NavItem", {
+      since: "2.4.0",
+      dropFrom: "2.5.0"
+    });
+    return NavItem;
+  }
+});
diff --git a/app/assets/javascripts/discourse/app/models/topic-details.js b/app/assets/javascripts/discourse/app/models/topic-details.js
index d8d5ea0036f..50449aa0e39 100644
--- a/app/assets/javascripts/discourse/app/models/topic-details.js
+++ b/app/assets/javascripts/discourse/app/models/topic-details.js
@@ -61,15 +61,12 @@ const TopicDetails = RestModel.extend({
     }
   },
 
-  updateNotifications(level) {
-    return ajax(`/t/${this.get("topic.id")}/notifications`, {
+  updateNotifications(v) {
+    this.set("notification_level", v);
+    this.set("notifications_reason_id", null);
+    return ajax("/t/" + this.get("topic.id") + "/notifications", {
       type: "POST",
-      data: { notification_level: level }
-    }).then(() => {
-      this.setProperties({
-        notification_level: level,
-        notifications_reason_id: null
-      });
+      data: { notification_level: v }
     });
   },
 
diff --git a/app/assets/javascripts/discourse/app/templates/about.hbs b/app/assets/javascripts/discourse/app/templates/about.hbs
index 2659b0ebac4..63cae2c2609 100644
--- a/app/assets/javascripts/discourse/app/templates/about.hbs
+++ b/app/assets/javascripts/discourse/app/templates/about.hbs
@@ -64,52 +64,50 @@
           </section>
         {{/each}}
       {{/if}}
-      {{#if model.can_see_about_stats}}
-        <section class="about stats">
-          <h3>{{d-icon "far-chart-bar"}}  {{i18n "about.stats"}}</h3>
+      <section class="about stats">
+        <h3>{{d-icon "far-chart-bar"}}  {{i18n "about.stats"}}</h3>
 
-          <table class="table">
-            <tbody>
-              <tr>
-                <th>&nbsp;</th>
-                <th>{{i18n "about.stat.last_7_days"}}</th>
-                <th>{{i18n "about.stat.last_30_days"}}</th>
-                <th>{{i18n "about.stat.all_time"}}</th>
-              </tr>
-              <tr>
-                <td class="title">{{i18n "about.topic_count"}}</td>
-                <td>{{number model.stats.topics_7_days}}</td>
-                <td>{{number model.stats.topics_30_days}}</td>
-                <td>{{number model.stats.topic_count}}</td>
-              </tr>
-              <tr>
-                <td>{{i18n "about.post_count"}}</td>
-                <td>{{number model.stats.posts_7_days}}</td>
-                <td>{{number model.stats.posts_30_days}}</td>
-                <td>{{number model.stats.post_count}}</td>
-              </tr>
-              <tr>
-                <td>{{i18n "about.user_count"}}</td>
-                <td>{{number model.stats.users_7_days}}</td>
-                <td>{{number model.stats.users_30_days}}</td>
-                <td>{{number model.stats.user_count}}</td>
-              </tr>
-              <tr>
-                <td>{{i18n "about.active_user_count"}}</td>
-                <td>{{number model.stats.active_users_7_days}}</td>
-                <td>{{number model.stats.active_users_30_days}}</td>
-                <td>&mdash;</td>
-              </tr>
-              <tr>
-                <td>{{i18n "about.like_count"}}</td>
-                <td>{{number model.stats.likes_7_days}}</td>
-                <td>{{number model.stats.likes_30_days}}</td>
-                <td>{{number model.stats.like_count}}</td>
-              </tr>
-            </tbody>
-          </table>
-        </section>
-      {{/if}}
+        <table class="table">
+          <tbody>
+            <tr>
+              <th>&nbsp;</th>
+              <th>{{i18n "about.stat.last_7_days"}}</th>
+              <th>{{i18n "about.stat.last_30_days"}}</th>
+              <th>{{i18n "about.stat.all_time"}}</th>
+            </tr>
+            <tr>
+              <td class="title">{{i18n "about.topic_count"}}</td>
+              <td>{{number model.stats.topics_7_days}}</td>
+              <td>{{number model.stats.topics_30_days}}</td>
+              <td>{{number model.stats.topic_count}}</td>
+            </tr>
+            <tr>
+              <td>{{i18n "about.post_count"}}</td>
+              <td>{{number model.stats.posts_7_days}}</td>
+              <td>{{number model.stats.posts_30_days}}</td>
+              <td>{{number model.stats.post_count}}</td>
+            </tr>
+            <tr>
+              <td>{{i18n "about.user_count"}}</td>
+              <td>{{number model.stats.users_7_days}}</td>
+              <td>{{number model.stats.users_30_days}}</td>
+              <td>{{number model.stats.user_count}}</td>
+            </tr>
+            <tr>
+              <td>{{i18n "about.active_user_count"}}</td>
+              <td>{{number model.stats.active_users_7_days}}</td>
+              <td>{{number model.stats.active_users_30_days}}</td>
+              <td>&mdash;</td>
+            </tr>
+            <tr>
+              <td>{{i18n "about.like_count"}}</td>
+              <td>{{number model.stats.likes_7_days}}</td>
+              <td>{{number model.stats.likes_30_days}}</td>
+              <td>{{number model.stats.like_count}}</td>
+            </tr>
+          </tbody>
+        </table>
+      </section>
 
       {{#if contactInfo}}
         <section class="about contact">
diff --git a/app/assets/javascripts/discourse/app/templates/components/d-navigation.hbs b/app/assets/javascripts/discourse/app/templates/components/d-navigation.hbs
index 2ac52d5f71b..e9e0b9a34f1 100644
--- a/app/assets/javascripts/discourse/app/templates/components/d-navigation.hbs
+++ b/app/assets/javascripts/discourse/app/templates/components/d-navigation.hbs
@@ -3,9 +3,6 @@
 {{#if showCategoryAdmin}}
   {{categories-admin-dropdown
     onChange=(action "selectCategoryAdminDropdownAction")
-    options=(hash
-      triggerOnChangeOnTab=false
-    )
   }}
 {{/if}}
 
diff --git a/app/assets/javascripts/discourse/app/templates/components/topic-footer-buttons.hbs b/app/assets/javascripts/discourse/app/templates/components/topic-footer-buttons.hbs
index aa5b44a7163..007ec9c19d2 100644
--- a/app/assets/javascripts/discourse/app/templates/components/topic-footer-buttons.hbs
+++ b/app/assets/javascripts/discourse/app/templates/components/topic-footer-buttons.hbs
@@ -50,9 +50,9 @@
                   args=(hash topic=topic)
                   tagName=""
                   connectorTagName="span"}}
-</div>
 
-{{pinned-button pinned=topic.pinned topic=topic}}
+  {{pinned-button pinned=topic.pinned topic=topic}}
+</div>
 
 {{#if showNotificationsButton}}
   {{topic-notifications-button
diff --git a/app/assets/javascripts/discourse/app/templates/preferences/interface.hbs b/app/assets/javascripts/discourse/app/templates/preferences/interface.hbs
index 4f1f13c6147..45607c8cb75 100644
--- a/app/assets/javascripts/discourse/app/templates/preferences/interface.hbs
+++ b/app/assets/javascripts/discourse/app/templates/preferences/interface.hbs
@@ -5,11 +5,9 @@
       {{combo-box
         content=userSelectableThemes
         value=themeId
+        onChange=(action (mut themeId))
       }}
     </div>
-    {{#if themeIdChanged}}
-      <p class="alert alert-success save-theme-alert">{{i18n "user.save_to_change_theme" save_text=(i18n "save") }}</p>
-    {{/if}}
     {{#if showThemeSetDefault}}
       <div class="controls">
         {{preference-checkbox labelKey="user.theme_default_on_all_devices" checked=makeThemeDefault}}
diff --git a/app/assets/javascripts/discourse/app/templates/topic.hbs b/app/assets/javascripts/discourse/app/templates/topic.hbs
index d5e22f54379..488970c10e8 100644
--- a/app/assets/javascripts/discourse/app/templates/topic.hbs
+++ b/app/assets/javascripts/discourse/app/templates/topic.hbs
@@ -36,7 +36,6 @@
                 options=(hash
                   filterable=true
                   categoryId=buffered.category_id
-                  minimum=minimumRequiredTags
                 )
               }}
             {{/if}}
diff --git a/app/assets/javascripts/discourse/app/widgets/header.js b/app/assets/javascripts/discourse/app/widgets/header.js
index 8e27a15a036..ca4d73c9256 100644
--- a/app/assets/javascripts/discourse/app/widgets/header.js
+++ b/app/assets/javascripts/discourse/app/widgets/header.js
@@ -125,7 +125,6 @@ createWidget(
           {
             attributes: {
               href: attrs.user.get("path"),
-              title: attrs.user.get("name"),
               "data-auto-route": true
             }
           },
diff --git a/app/assets/javascripts/select-kit/addon/.gitkeep b/app/assets/javascripts/select-kit/addon/.gitkeep
deleted file mode 100644
index e69de29bb2d..00000000000
diff --git a/app/assets/javascripts/select-kit/addon/templates/components/pinned-button.hbs b/app/assets/javascripts/select-kit/addon/templates/components/pinned-button.hbs
deleted file mode 100644
index 91bfe147ff6..00000000000
--- a/app/assets/javascripts/select-kit/addon/templates/components/pinned-button.hbs
+++ /dev/null
@@ -1,4 +0,0 @@
-<p class="reason">
-  {{pinned-options value=pinned topic=topic}}
-  <span class="text">{{html-safe reasonText}}</span>
-</p>
diff --git a/app/assets/javascripts/select-kit/addon/templates/components/topic-notifications-button.hbs b/app/assets/javascripts/select-kit/addon/templates/components/topic-notifications-button.hbs
deleted file mode 100644
index f21111ebbd5..00000000000
--- a/app/assets/javascripts/select-kit/addon/templates/components/topic-notifications-button.hbs
+++ /dev/null
@@ -1,30 +0,0 @@
-{{#if appendReason}}
-  <p class="reason">
-    {{topic-notifications-options
-      value=notificationLevel
-      topic=topic
-      onChange=(action "changeTopicNotificationLevel")
-      options=(hash
-        icon=icon
-        showFullTitle=showFullTitle
-        placement=placement
-        preventsClickPropagation=true
-        showCaret=showCaret
-      )
-    }}
-    <span class="text">{{html-safe topic.details.notificationReasonText}}</span>
-  </p>
-{{else}}
-  {{topic-notifications-options
-    value=notificationLevel
-    topic=topic
-    onChange=(action "changeTopicNotificationLevel")
-    options=(hash
-      icon=icon
-      showFullTitle=showFullTitle
-      placement=placement
-      preventsClickPropagation=true
-      showCaret=showCaret
-    )
-  }}
-{{/if}}
diff --git a/app/assets/javascripts/select-kit/addon/components/admin-group-selector.js b/app/assets/javascripts/select-kit/app/components/admin-group-selector.js
similarity index 100%
rename from app/assets/javascripts/select-kit/addon/components/admin-group-selector.js
rename to app/assets/javascripts/select-kit/app/components/admin-group-selector.js
diff --git a/app/assets/javascripts/select-kit/addon/components/categories-admin-dropdown.js b/app/assets/javascripts/select-kit/app/components/categories-admin-dropdown.js
similarity index 100%
rename from app/assets/javascripts/select-kit/addon/components/categories-admin-dropdown.js
rename to app/assets/javascripts/select-kit/app/components/categories-admin-dropdown.js
diff --git a/app/assets/javascripts/select-kit/addon/components/category-chooser.js b/app/assets/javascripts/select-kit/app/components/category-chooser.js
similarity index 99%
rename from app/assets/javascripts/select-kit/addon/components/category-chooser.js
rename to app/assets/javascripts/select-kit/app/components/category-chooser.js
index 72d0167ac09..f36e8be2d32 100644
--- a/app/assets/javascripts/select-kit/addon/components/category-chooser.js
+++ b/app/assets/javascripts/select-kit/app/components/category-chooser.js
@@ -67,7 +67,6 @@ export default ComboBoxComponent.extend({
 
   search(filter) {
     if (filter) {
-      filter = filter.toLowerCase();
       return this.content.filter(item => {
         const category = Category.findById(this.getValue(item));
         const categoryName = this.getName(item);
diff --git a/app/assets/javascripts/select-kit/addon/components/category-drop.js b/app/assets/javascripts/select-kit/app/components/category-drop.js
similarity index 100%
rename from app/assets/javascripts/select-kit/addon/components/category-drop.js
rename to app/assets/javascripts/select-kit/app/components/category-drop.js
diff --git a/app/assets/javascripts/select-kit/addon/components/category-drop/category-drop-header.js b/app/assets/javascripts/select-kit/app/components/category-drop/category-drop-header.js
similarity index 100%
rename from app/assets/javascripts/select-kit/addon/components/category-drop/category-drop-header.js
rename to app/assets/javascripts/select-kit/app/components/category-drop/category-drop-header.js
diff --git a/app/assets/javascripts/select-kit/addon/components/category-notifications-button.js b/app/assets/javascripts/select-kit/app/components/category-notifications-button.js
similarity index 100%
rename from app/assets/javascripts/select-kit/addon/components/category-notifications-button.js
rename to app/assets/javascripts/select-kit/app/components/category-notifications-button.js
diff --git a/app/assets/javascripts/select-kit/addon/components/category-row.js b/app/assets/javascripts/select-kit/app/components/category-row.js
similarity index 100%
rename from app/assets/javascripts/select-kit/addon/components/category-row.js
rename to app/assets/javascripts/select-kit/app/components/category-row.js
diff --git a/app/assets/javascripts/select-kit/addon/components/category-selector.js b/app/assets/javascripts/select-kit/app/components/category-selector.js
similarity index 100%
rename from app/assets/javascripts/select-kit/addon/components/category-selector.js
rename to app/assets/javascripts/select-kit/app/components/category-selector.js
diff --git a/app/assets/javascripts/select-kit/addon/components/color-palettes.js b/app/assets/javascripts/select-kit/app/components/color-palettes.js
similarity index 100%
rename from app/assets/javascripts/select-kit/addon/components/color-palettes.js
rename to app/assets/javascripts/select-kit/app/components/color-palettes.js
diff --git a/app/assets/javascripts/select-kit/addon/components/color-palettes/color-palettes-row.js b/app/assets/javascripts/select-kit/app/components/color-palettes/color-palettes-row.js
similarity index 100%
rename from app/assets/javascripts/select-kit/addon/components/color-palettes/color-palettes-row.js
rename to app/assets/javascripts/select-kit/app/components/color-palettes/color-palettes-row.js
diff --git a/app/assets/javascripts/select-kit/addon/components/combo-box.js b/app/assets/javascripts/select-kit/app/components/combo-box.js
similarity index 100%
rename from app/assets/javascripts/select-kit/addon/components/combo-box.js
rename to app/assets/javascripts/select-kit/app/components/combo-box.js
diff --git a/app/assets/javascripts/select-kit/addon/components/combo-box/combo-box-header.js b/app/assets/javascripts/select-kit/app/components/combo-box/combo-box-header.js
similarity index 100%
rename from app/assets/javascripts/select-kit/addon/components/combo-box/combo-box-header.js
rename to app/assets/javascripts/select-kit/app/components/combo-box/combo-box-header.js
diff --git a/app/assets/javascripts/select-kit/addon/components/composer-actions.js b/app/assets/javascripts/select-kit/app/components/composer-actions.js
similarity index 100%
rename from app/assets/javascripts/select-kit/addon/components/composer-actions.js
rename to app/assets/javascripts/select-kit/app/components/composer-actions.js
diff --git a/app/assets/javascripts/select-kit/addon/components/create-color-row.js b/app/assets/javascripts/select-kit/app/components/create-color-row.js
similarity index 100%
rename from app/assets/javascripts/select-kit/addon/components/create-color-row.js
rename to app/assets/javascripts/select-kit/app/components/create-color-row.js
diff --git a/app/assets/javascripts/select-kit/addon/components/dropdown-select-box.js b/app/assets/javascripts/select-kit/app/components/dropdown-select-box.js
similarity index 100%
rename from app/assets/javascripts/select-kit/addon/components/dropdown-select-box.js
rename to app/assets/javascripts/select-kit/app/components/dropdown-select-box.js
diff --git a/app/assets/javascripts/select-kit/addon/components/dropdown-select-box/dropdown-select-box-header.js b/app/assets/javascripts/select-kit/app/components/dropdown-select-box/dropdown-select-box-header.js
similarity index 100%
rename from app/assets/javascripts/select-kit/addon/components/dropdown-select-box/dropdown-select-box-header.js
rename to app/assets/javascripts/select-kit/app/components/dropdown-select-box/dropdown-select-box-header.js
diff --git a/app/assets/javascripts/select-kit/addon/components/dropdown-select-box/dropdown-select-box-row.js b/app/assets/javascripts/select-kit/app/components/dropdown-select-box/dropdown-select-box-row.js
similarity index 100%
rename from app/assets/javascripts/select-kit/addon/components/dropdown-select-box/dropdown-select-box-row.js
rename to app/assets/javascripts/select-kit/app/components/dropdown-select-box/dropdown-select-box-row.js
diff --git a/app/assets/javascripts/select-kit/addon/components/future-date-input-selector.js b/app/assets/javascripts/select-kit/app/components/future-date-input-selector.js
similarity index 100%
rename from app/assets/javascripts/select-kit/addon/components/future-date-input-selector.js
rename to app/assets/javascripts/select-kit/app/components/future-date-input-selector.js
diff --git a/app/assets/javascripts/select-kit/addon/components/future-date-input-selector/future-date-input-selector-header.js b/app/assets/javascripts/select-kit/app/components/future-date-input-selector/future-date-input-selector-header.js
similarity index 100%
rename from app/assets/javascripts/select-kit/addon/components/future-date-input-selector/future-date-input-selector-header.js
rename to app/assets/javascripts/select-kit/app/components/future-date-input-selector/future-date-input-selector-header.js
diff --git a/app/assets/javascripts/select-kit/addon/components/future-date-input-selector/future-date-input-selector-row.js b/app/assets/javascripts/select-kit/app/components/future-date-input-selector/future-date-input-selector-row.js
similarity index 100%
rename from app/assets/javascripts/select-kit/addon/components/future-date-input-selector/future-date-input-selector-row.js
rename to app/assets/javascripts/select-kit/app/components/future-date-input-selector/future-date-input-selector-row.js
diff --git a/app/assets/javascripts/select-kit/addon/components/future-date-input-selector/mixin.js b/app/assets/javascripts/select-kit/app/components/future-date-input-selector/mixin.js
similarity index 100%
rename from app/assets/javascripts/select-kit/addon/components/future-date-input-selector/mixin.js
rename to app/assets/javascripts/select-kit/app/components/future-date-input-selector/mixin.js
diff --git a/app/assets/javascripts/select-kit/addon/components/group-dropdown.js b/app/assets/javascripts/select-kit/app/components/group-dropdown.js
similarity index 100%
rename from app/assets/javascripts/select-kit/addon/components/group-dropdown.js
rename to app/assets/javascripts/select-kit/app/components/group-dropdown.js
diff --git a/app/assets/javascripts/select-kit/addon/components/group-members-dropdown.js b/app/assets/javascripts/select-kit/app/components/group-members-dropdown.js
similarity index 100%
rename from app/assets/javascripts/select-kit/addon/components/group-members-dropdown.js
rename to app/assets/javascripts/select-kit/app/components/group-members-dropdown.js
diff --git a/app/assets/javascripts/select-kit/addon/components/group-notifications-button.js b/app/assets/javascripts/select-kit/app/components/group-notifications-button.js
similarity index 100%
rename from app/assets/javascripts/select-kit/addon/components/group-notifications-button.js
rename to app/assets/javascripts/select-kit/app/components/group-notifications-button.js
diff --git a/app/assets/javascripts/select-kit/addon/components/icon-picker.js b/app/assets/javascripts/select-kit/app/components/icon-picker.js
similarity index 100%
rename from app/assets/javascripts/select-kit/addon/components/icon-picker.js
rename to app/assets/javascripts/select-kit/app/components/icon-picker.js
diff --git a/app/assets/javascripts/select-kit/addon/components/list-setting.js b/app/assets/javascripts/select-kit/app/components/list-setting.js
similarity index 100%
rename from app/assets/javascripts/select-kit/addon/components/list-setting.js
rename to app/assets/javascripts/select-kit/app/components/list-setting.js
diff --git a/app/assets/javascripts/select-kit/addon/components/mini-tag-chooser.js b/app/assets/javascripts/select-kit/app/components/mini-tag-chooser.js
similarity index 100%
rename from app/assets/javascripts/select-kit/addon/components/mini-tag-chooser.js
rename to app/assets/javascripts/select-kit/app/components/mini-tag-chooser.js
diff --git a/app/assets/javascripts/select-kit/addon/components/mini-tag-chooser/mini-tag-chooser-header.js b/app/assets/javascripts/select-kit/app/components/mini-tag-chooser/mini-tag-chooser-header.js
similarity index 100%
rename from app/assets/javascripts/select-kit/addon/components/mini-tag-chooser/mini-tag-chooser-header.js
rename to app/assets/javascripts/select-kit/app/components/mini-tag-chooser/mini-tag-chooser-header.js
diff --git a/app/assets/javascripts/select-kit/addon/components/mini-tag-chooser/selected-collection.js b/app/assets/javascripts/select-kit/app/components/mini-tag-chooser/selected-collection.js
similarity index 100%
rename from app/assets/javascripts/select-kit/addon/components/mini-tag-chooser/selected-collection.js
rename to app/assets/javascripts/select-kit/app/components/mini-tag-chooser/selected-collection.js
diff --git a/app/assets/javascripts/select-kit/addon/components/multi-select.js b/app/assets/javascripts/select-kit/app/components/multi-select.js
similarity index 100%
rename from app/assets/javascripts/select-kit/addon/components/multi-select.js
rename to app/assets/javascripts/select-kit/app/components/multi-select.js
diff --git a/app/assets/javascripts/select-kit/addon/components/multi-select/multi-select-filter.js b/app/assets/javascripts/select-kit/app/components/multi-select/multi-select-filter.js
similarity index 100%
rename from app/assets/javascripts/select-kit/addon/components/multi-select/multi-select-filter.js
rename to app/assets/javascripts/select-kit/app/components/multi-select/multi-select-filter.js
diff --git a/app/assets/javascripts/select-kit/addon/components/multi-select/multi-select-header.js b/app/assets/javascripts/select-kit/app/components/multi-select/multi-select-header.js
similarity index 100%
rename from app/assets/javascripts/select-kit/addon/components/multi-select/multi-select-header.js
rename to app/assets/javascripts/select-kit/app/components/multi-select/multi-select-header.js
diff --git a/app/assets/javascripts/select-kit/addon/components/multi-select/selected-category.js b/app/assets/javascripts/select-kit/app/components/multi-select/selected-category.js
similarity index 100%
rename from app/assets/javascripts/select-kit/addon/components/multi-select/selected-category.js
rename to app/assets/javascripts/select-kit/app/components/multi-select/selected-category.js
diff --git a/app/assets/javascripts/select-kit/addon/components/multi-select/selected-color.js b/app/assets/javascripts/select-kit/app/components/multi-select/selected-color.js
similarity index 100%
rename from app/assets/javascripts/select-kit/addon/components/multi-select/selected-color.js
rename to app/assets/javascripts/select-kit/app/components/multi-select/selected-color.js
diff --git a/app/assets/javascripts/select-kit/addon/components/none-category-row.js b/app/assets/javascripts/select-kit/app/components/none-category-row.js
similarity index 100%
rename from app/assets/javascripts/select-kit/addon/components/none-category-row.js
rename to app/assets/javascripts/select-kit/app/components/none-category-row.js
diff --git a/app/assets/javascripts/select-kit/addon/components/notifications-button.js b/app/assets/javascripts/select-kit/app/components/notifications-button.js
similarity index 96%
rename from app/assets/javascripts/select-kit/addon/components/notifications-button.js
rename to app/assets/javascripts/select-kit/app/components/notifications-button.js
index 32dc2ad7ba1..f5423b9e64a 100644
--- a/app/assets/javascripts/select-kit/addon/components/notifications-button.js
+++ b/app/assets/javascripts/select-kit/app/components/notifications-button.js
@@ -13,7 +13,8 @@ export default DropdownSelectBoxComponent.extend({
     autoFilterable: false,
     filterable: false,
     i18nPrefix: "",
-    i18nPostfix: ""
+    i18nPostfix: "",
+    showCaret: true
   },
 
   modifyComponentForRow() {
diff --git a/app/assets/javascripts/select-kit/addon/components/notifications-button/notifications-button-row.js b/app/assets/javascripts/select-kit/app/components/notifications-button/notifications-button-row.js
similarity index 100%
rename from app/assets/javascripts/select-kit/addon/components/notifications-button/notifications-button-row.js
rename to app/assets/javascripts/select-kit/app/components/notifications-button/notifications-button-row.js
diff --git a/app/assets/javascripts/select-kit/addon/components/notifications-filter.js b/app/assets/javascripts/select-kit/app/components/notifications-filter.js
similarity index 100%
rename from app/assets/javascripts/select-kit/addon/components/notifications-filter.js
rename to app/assets/javascripts/select-kit/app/components/notifications-filter.js
diff --git a/app/assets/javascripts/select-kit/addon/components/notifications-filter/notifications-filter-header.js b/app/assets/javascripts/select-kit/app/components/notifications-filter/notifications-filter-header.js
similarity index 100%
rename from app/assets/javascripts/select-kit/addon/components/notifications-filter/notifications-filter-header.js
rename to app/assets/javascripts/select-kit/app/components/notifications-filter/notifications-filter-header.js
diff --git a/app/assets/javascripts/select-kit/addon/components/period-chooser.js b/app/assets/javascripts/select-kit/app/components/period-chooser.js
similarity index 100%
rename from app/assets/javascripts/select-kit/addon/components/period-chooser.js
rename to app/assets/javascripts/select-kit/app/components/period-chooser.js
diff --git a/app/assets/javascripts/select-kit/addon/components/period-chooser/period-chooser-header.js b/app/assets/javascripts/select-kit/app/components/period-chooser/period-chooser-header.js
similarity index 100%
rename from app/assets/javascripts/select-kit/addon/components/period-chooser/period-chooser-header.js
rename to app/assets/javascripts/select-kit/app/components/period-chooser/period-chooser-header.js
diff --git a/app/assets/javascripts/select-kit/addon/components/period-chooser/period-chooser-row.js b/app/assets/javascripts/select-kit/app/components/period-chooser/period-chooser-row.js
similarity index 100%
rename from app/assets/javascripts/select-kit/addon/components/period-chooser/period-chooser-row.js
rename to app/assets/javascripts/select-kit/app/components/period-chooser/period-chooser-row.js
diff --git a/app/assets/javascripts/select-kit/addon/components/pinned-button.js b/app/assets/javascripts/select-kit/app/components/pinned-button.js
similarity index 100%
rename from app/assets/javascripts/select-kit/addon/components/pinned-button.js
rename to app/assets/javascripts/select-kit/app/components/pinned-button.js
diff --git a/app/assets/javascripts/select-kit/addon/components/pinned-options.js b/app/assets/javascripts/select-kit/app/components/pinned-options.js
similarity index 100%
rename from app/assets/javascripts/select-kit/addon/components/pinned-options.js
rename to app/assets/javascripts/select-kit/app/components/pinned-options.js
diff --git a/app/assets/javascripts/select-kit/addon/components/search-advanced-category-chooser.js b/app/assets/javascripts/select-kit/app/components/search-advanced-category-chooser.js
similarity index 100%
rename from app/assets/javascripts/select-kit/addon/components/search-advanced-category-chooser.js
rename to app/assets/javascripts/select-kit/app/components/search-advanced-category-chooser.js
diff --git a/app/assets/javascripts/select-kit/addon/components/select-kit.js b/app/assets/javascripts/select-kit/app/components/select-kit.js
similarity index 99%
rename from app/assets/javascripts/select-kit/addon/components/select-kit.js
rename to app/assets/javascripts/select-kit/app/components/select-kit.js
index 02acfb5a2e1..f2fbbbf1c2b 100644
--- a/app/assets/javascripts/select-kit/addon/components/select-kit.js
+++ b/app/assets/javascripts/select-kit/app/components/select-kit.js
@@ -1,6 +1,5 @@
 import I18n from "I18n";
-import EmberObject, { computed, get } from "@ember/object";
-import { guidFor } from "@ember/object/internals";
+import EmberObject, { computed, get, guidFor } from "@ember/object";
 import Component from "@ember/component";
 import deprecated from "discourse-common/lib/deprecated";
 import { makeArray } from "discourse-common/lib/helpers";
@@ -272,8 +271,7 @@ export default Component.extend(
       selectedNameComponent: "selected-name",
       castInteger: false,
       preventsClickPropagation: false,
-      focusAfterOnChange: true,
-      triggerOnChangeOnTab: true
+      focusAfterOnChange: true
     },
 
     autoFilterable: computed("content.[]", "selectKit.filter", function() {
diff --git a/app/assets/javascripts/select-kit/addon/components/select-kit/errors-collection.js b/app/assets/javascripts/select-kit/app/components/select-kit/errors-collection.js
similarity index 100%
rename from app/assets/javascripts/select-kit/addon/components/select-kit/errors-collection.js
rename to app/assets/javascripts/select-kit/app/components/select-kit/errors-collection.js
diff --git a/app/assets/javascripts/select-kit/addon/components/select-kit/select-kit-body.js b/app/assets/javascripts/select-kit/app/components/select-kit/select-kit-body.js
similarity index 100%
rename from app/assets/javascripts/select-kit/addon/components/select-kit/select-kit-body.js
rename to app/assets/javascripts/select-kit/app/components/select-kit/select-kit-body.js
diff --git a/app/assets/javascripts/select-kit/addon/components/select-kit/select-kit-collection.js b/app/assets/javascripts/select-kit/app/components/select-kit/select-kit-collection.js
similarity index 100%
rename from app/assets/javascripts/select-kit/addon/components/select-kit/select-kit-collection.js
rename to app/assets/javascripts/select-kit/app/components/select-kit/select-kit-collection.js
diff --git a/app/assets/javascripts/select-kit/addon/components/select-kit/select-kit-create-row.js b/app/assets/javascripts/select-kit/app/components/select-kit/select-kit-create-row.js
similarity index 100%
rename from app/assets/javascripts/select-kit/addon/components/select-kit/select-kit-create-row.js
rename to app/assets/javascripts/select-kit/app/components/select-kit/select-kit-create-row.js
diff --git a/app/assets/javascripts/select-kit/addon/components/select-kit/select-kit-filter.js b/app/assets/javascripts/select-kit/app/components/select-kit/select-kit-filter.js
similarity index 100%
rename from app/assets/javascripts/select-kit/addon/components/select-kit/select-kit-filter.js
rename to app/assets/javascripts/select-kit/app/components/select-kit/select-kit-filter.js
diff --git a/app/assets/javascripts/select-kit/addon/components/select-kit/select-kit-header.js b/app/assets/javascripts/select-kit/app/components/select-kit/select-kit-header.js
similarity index 97%
rename from app/assets/javascripts/select-kit/addon/components/select-kit/select-kit-header.js
rename to app/assets/javascripts/select-kit/app/components/select-kit/select-kit-header.js
index 5697826f59f..785b2a47022 100644
--- a/app/assets/javascripts/select-kit/addon/components/select-kit/select-kit-header.js
+++ b/app/assets/javascripts/select-kit/app/components/select-kit/select-kit-header.js
@@ -140,11 +140,7 @@ export default Component.extend(UtilsMixin, {
       this._focusFilterInput();
     } else if (event.keyCode === 9) {
       // Tab
-      if (
-        this.selectKit.highlighted &&
-        this.selectKit.isExpanded &&
-        this.selectKit.options.triggerOnChangeOnTab
-      ) {
+      if (this.selectKit.highlighted && this.selectKit.isExpanded) {
         this.selectKit.select(
           this.getValue(this.selectKit.highlighted),
           this.selectKit.highlighted
diff --git a/app/assets/javascripts/select-kit/addon/components/select-kit/select-kit-none-row.js b/app/assets/javascripts/select-kit/app/components/select-kit/select-kit-none-row.js
similarity index 100%
rename from app/assets/javascripts/select-kit/addon/components/select-kit/select-kit-none-row.js
rename to app/assets/javascripts/select-kit/app/components/select-kit/select-kit-none-row.js
diff --git a/app/assets/javascripts/select-kit/addon/components/select-kit/select-kit-row.js b/app/assets/javascripts/select-kit/app/components/select-kit/select-kit-row.js
similarity index 100%
rename from app/assets/javascripts/select-kit/addon/components/select-kit/select-kit-row.js
rename to app/assets/javascripts/select-kit/app/components/select-kit/select-kit-row.js
diff --git a/app/assets/javascripts/select-kit/addon/components/select-kit/single-select-header.js b/app/assets/javascripts/select-kit/app/components/select-kit/single-select-header.js
similarity index 100%
rename from app/assets/javascripts/select-kit/addon/components/select-kit/single-select-header.js
rename to app/assets/javascripts/select-kit/app/components/select-kit/single-select-header.js
diff --git a/app/assets/javascripts/select-kit/addon/components/selected-color.js b/app/assets/javascripts/select-kit/app/components/selected-color.js
similarity index 100%
rename from app/assets/javascripts/select-kit/addon/components/selected-color.js
rename to app/assets/javascripts/select-kit/app/components/selected-color.js
diff --git a/app/assets/javascripts/select-kit/addon/components/selected-name.js b/app/assets/javascripts/select-kit/app/components/selected-name.js
similarity index 100%
rename from app/assets/javascripts/select-kit/addon/components/selected-name.js
rename to app/assets/javascripts/select-kit/app/components/selected-name.js
diff --git a/app/assets/javascripts/select-kit/addon/components/single-select.js b/app/assets/javascripts/select-kit/app/components/single-select.js
similarity index 100%
rename from app/assets/javascripts/select-kit/addon/components/single-select.js
rename to app/assets/javascripts/select-kit/app/components/single-select.js
diff --git a/app/assets/javascripts/select-kit/addon/components/tag-chooser-row.js b/app/assets/javascripts/select-kit/app/components/tag-chooser-row.js
similarity index 100%
rename from app/assets/javascripts/select-kit/addon/components/tag-chooser-row.js
rename to app/assets/javascripts/select-kit/app/components/tag-chooser-row.js
diff --git a/app/assets/javascripts/select-kit/addon/components/tag-chooser.js b/app/assets/javascripts/select-kit/app/components/tag-chooser.js
similarity index 100%
rename from app/assets/javascripts/select-kit/addon/components/tag-chooser.js
rename to app/assets/javascripts/select-kit/app/components/tag-chooser.js
diff --git a/app/assets/javascripts/select-kit/addon/components/tag-drop.js b/app/assets/javascripts/select-kit/app/components/tag-drop.js
similarity index 100%
rename from app/assets/javascripts/select-kit/addon/components/tag-drop.js
rename to app/assets/javascripts/select-kit/app/components/tag-drop.js
diff --git a/app/assets/javascripts/select-kit/addon/components/tag-drop/tag-drop-header.js b/app/assets/javascripts/select-kit/app/components/tag-drop/tag-drop-header.js
similarity index 100%
rename from app/assets/javascripts/select-kit/addon/components/tag-drop/tag-drop-header.js
rename to app/assets/javascripts/select-kit/app/components/tag-drop/tag-drop-header.js
diff --git a/app/assets/javascripts/select-kit/addon/components/tag-group-chooser.js b/app/assets/javascripts/select-kit/app/components/tag-group-chooser.js
similarity index 100%
rename from app/assets/javascripts/select-kit/addon/components/tag-group-chooser.js
rename to app/assets/javascripts/select-kit/app/components/tag-group-chooser.js
diff --git a/app/assets/javascripts/select-kit/addon/components/tag-notifications-button.js b/app/assets/javascripts/select-kit/app/components/tag-notifications-button.js
similarity index 100%
rename from app/assets/javascripts/select-kit/addon/components/tag-notifications-button.js
rename to app/assets/javascripts/select-kit/app/components/tag-notifications-button.js
diff --git a/app/assets/javascripts/select-kit/addon/components/tag-row.js b/app/assets/javascripts/select-kit/app/components/tag-row.js
similarity index 100%
rename from app/assets/javascripts/select-kit/addon/components/tag-row.js
rename to app/assets/javascripts/select-kit/app/components/tag-row.js
diff --git a/app/assets/javascripts/select-kit/addon/components/timezone-input.js b/app/assets/javascripts/select-kit/app/components/timezone-input.js
similarity index 100%
rename from app/assets/javascripts/select-kit/addon/components/timezone-input.js
rename to app/assets/javascripts/select-kit/app/components/timezone-input.js
diff --git a/app/assets/javascripts/select-kit/addon/components/toolbar-popup-menu-options.js b/app/assets/javascripts/select-kit/app/components/toolbar-popup-menu-options.js
similarity index 100%
rename from app/assets/javascripts/select-kit/addon/components/toolbar-popup-menu-options.js
rename to app/assets/javascripts/select-kit/app/components/toolbar-popup-menu-options.js
diff --git a/app/assets/javascripts/select-kit/addon/components/toolbar-popup-menu-options/toolbar-popup-menu-options-heading.js b/app/assets/javascripts/select-kit/app/components/toolbar-popup-menu-options/toolbar-popup-menu-options-heading.js
similarity index 100%
rename from app/assets/javascripts/select-kit/addon/components/toolbar-popup-menu-options/toolbar-popup-menu-options-heading.js
rename to app/assets/javascripts/select-kit/app/components/toolbar-popup-menu-options/toolbar-popup-menu-options-heading.js
diff --git a/app/assets/javascripts/select-kit/addon/components/topic-footer-mobile-dropdown.js b/app/assets/javascripts/select-kit/app/components/topic-footer-mobile-dropdown.js
similarity index 100%
rename from app/assets/javascripts/select-kit/addon/components/topic-footer-mobile-dropdown.js
rename to app/assets/javascripts/select-kit/app/components/topic-footer-mobile-dropdown.js
diff --git a/app/assets/javascripts/select-kit/addon/components/topic-notifications-button.js b/app/assets/javascripts/select-kit/app/components/topic-notifications-button.js
similarity index 55%
rename from app/assets/javascripts/select-kit/addon/components/topic-notifications-button.js
rename to app/assets/javascripts/select-kit/app/components/topic-notifications-button.js
index d9c09001823..58329393e7c 100644
--- a/app/assets/javascripts/select-kit/addon/components/topic-notifications-button.js
+++ b/app/assets/javascripts/select-kit/app/components/topic-notifications-button.js
@@ -1,28 +1,20 @@
 import Component from "@ember/component";
-import { action, computed } from "@ember/object";
+import { action } from "@ember/object";
 
 export default Component.extend({
   layoutName: "select-kit/templates/components/topic-notifications-button",
   classNames: ["topic-notifications-button"],
-  classNameBindings: ["isLoading"],
   appendReason: true,
   showFullTitle: true,
   placement: "bottom-start",
   notificationLevel: null,
   topic: null,
   showCaret: true,
-  isLoading: false,
-  icon: computed("isLoading", function() {
-    return this.isLoading ? "spinner" : null;
-  }),
 
   @action
   changeTopicNotificationLevel(levelId) {
     if (levelId !== this.notificationLevel) {
-      this.set("isLoading", true);
-      this.topic.details
-        .updateNotifications(levelId)
-        .finally(() => this.set("isLoading", false));
+      this.topic.details.updateNotifications(levelId);
     }
   }
 });
diff --git a/app/assets/javascripts/select-kit/addon/components/topic-notifications-options.js b/app/assets/javascripts/select-kit/app/components/topic-notifications-options.js
similarity index 100%
rename from app/assets/javascripts/select-kit/addon/components/topic-notifications-options.js
rename to app/assets/javascripts/select-kit/app/components/topic-notifications-options.js
diff --git a/app/assets/javascripts/select-kit/addon/components/user-chooser.js b/app/assets/javascripts/select-kit/app/components/user-chooser.js
similarity index 100%
rename from app/assets/javascripts/select-kit/addon/components/user-chooser.js
rename to app/assets/javascripts/select-kit/app/components/user-chooser.js
diff --git a/app/assets/javascripts/select-kit/addon/components/user-chooser/user-row.js b/app/assets/javascripts/select-kit/app/components/user-chooser/user-row.js
similarity index 100%
rename from app/assets/javascripts/select-kit/addon/components/user-chooser/user-row.js
rename to app/assets/javascripts/select-kit/app/components/user-chooser/user-row.js
diff --git a/app/assets/javascripts/select-kit/addon/components/user-notifications-dropdown.js b/app/assets/javascripts/select-kit/app/components/user-notifications-dropdown.js
similarity index 100%
rename from app/assets/javascripts/select-kit/addon/components/user-notifications-dropdown.js
rename to app/assets/javascripts/select-kit/app/components/user-notifications-dropdown.js
diff --git a/app/assets/javascripts/select-kit/addon/mixins/plugin-api.js b/app/assets/javascripts/select-kit/app/mixins/plugin-api.js
similarity index 100%
rename from app/assets/javascripts/select-kit/addon/mixins/plugin-api.js
rename to app/assets/javascripts/select-kit/app/mixins/plugin-api.js
diff --git a/app/assets/javascripts/select-kit/addon/mixins/tags.js b/app/assets/javascripts/select-kit/app/mixins/tags.js
similarity index 100%
rename from app/assets/javascripts/select-kit/addon/mixins/tags.js
rename to app/assets/javascripts/select-kit/app/mixins/tags.js
diff --git a/app/assets/javascripts/select-kit/addon/mixins/utils.js b/app/assets/javascripts/select-kit/app/mixins/utils.js
similarity index 100%
rename from app/assets/javascripts/select-kit/addon/mixins/utils.js
rename to app/assets/javascripts/select-kit/app/mixins/utils.js
diff --git a/app/assets/javascripts/select-kit/addon/templates/components/category-drop/category-drop-header.hbs b/app/assets/javascripts/select-kit/app/templates/components/category-drop/category-drop-header.hbs
similarity index 100%
rename from app/assets/javascripts/select-kit/addon/templates/components/category-drop/category-drop-header.hbs
rename to app/assets/javascripts/select-kit/app/templates/components/category-drop/category-drop-header.hbs
diff --git a/app/assets/javascripts/select-kit/addon/templates/components/category-row.hbs b/app/assets/javascripts/select-kit/app/templates/components/category-row.hbs
similarity index 100%
rename from app/assets/javascripts/select-kit/addon/templates/components/category-row.hbs
rename to app/assets/javascripts/select-kit/app/templates/components/category-row.hbs
diff --git a/app/assets/javascripts/select-kit/addon/templates/components/color-palettes/color-palettes-row.hbs b/app/assets/javascripts/select-kit/app/templates/components/color-palettes/color-palettes-row.hbs
similarity index 100%
rename from app/assets/javascripts/select-kit/addon/templates/components/color-palettes/color-palettes-row.hbs
rename to app/assets/javascripts/select-kit/app/templates/components/color-palettes/color-palettes-row.hbs
diff --git a/app/assets/javascripts/select-kit/addon/templates/components/combo-box/combo-box-header.hbs b/app/assets/javascripts/select-kit/app/templates/components/combo-box/combo-box-header.hbs
similarity index 100%
rename from app/assets/javascripts/select-kit/addon/templates/components/combo-box/combo-box-header.hbs
rename to app/assets/javascripts/select-kit/app/templates/components/combo-box/combo-box-header.hbs
diff --git a/app/assets/javascripts/select-kit/addon/templates/components/create-color-row.hbs b/app/assets/javascripts/select-kit/app/templates/components/create-color-row.hbs
similarity index 100%
rename from app/assets/javascripts/select-kit/addon/templates/components/create-color-row.hbs
rename to app/assets/javascripts/select-kit/app/templates/components/create-color-row.hbs
diff --git a/app/assets/javascripts/select-kit/addon/templates/components/dropdown-select-box/dropdown-select-box-header.hbs b/app/assets/javascripts/select-kit/app/templates/components/dropdown-select-box/dropdown-select-box-header.hbs
similarity index 100%
rename from app/assets/javascripts/select-kit/addon/templates/components/dropdown-select-box/dropdown-select-box-header.hbs
rename to app/assets/javascripts/select-kit/app/templates/components/dropdown-select-box/dropdown-select-box-header.hbs
diff --git a/app/assets/javascripts/select-kit/addon/templates/components/dropdown-select-box/dropdown-select-box-row.hbs b/app/assets/javascripts/select-kit/app/templates/components/dropdown-select-box/dropdown-select-box-row.hbs
similarity index 100%
rename from app/assets/javascripts/select-kit/addon/templates/components/dropdown-select-box/dropdown-select-box-row.hbs
rename to app/assets/javascripts/select-kit/app/templates/components/dropdown-select-box/dropdown-select-box-row.hbs
diff --git a/app/assets/javascripts/select-kit/addon/templates/components/future-date-input-selector/future-date-input-selector-header.hbs b/app/assets/javascripts/select-kit/app/templates/components/future-date-input-selector/future-date-input-selector-header.hbs
similarity index 100%
rename from app/assets/javascripts/select-kit/addon/templates/components/future-date-input-selector/future-date-input-selector-header.hbs
rename to app/assets/javascripts/select-kit/app/templates/components/future-date-input-selector/future-date-input-selector-header.hbs
diff --git a/app/assets/javascripts/select-kit/addon/templates/components/future-date-input-selector/future-date-input-selector-row.hbs b/app/assets/javascripts/select-kit/app/templates/components/future-date-input-selector/future-date-input-selector-row.hbs
similarity index 100%
rename from app/assets/javascripts/select-kit/addon/templates/components/future-date-input-selector/future-date-input-selector-row.hbs
rename to app/assets/javascripts/select-kit/app/templates/components/future-date-input-selector/future-date-input-selector-row.hbs
diff --git a/app/assets/javascripts/select-kit/addon/templates/components/mini-tag-chooser/mini-tag-chooser-header.hbs b/app/assets/javascripts/select-kit/app/templates/components/mini-tag-chooser/mini-tag-chooser-header.hbs
similarity index 100%
rename from app/assets/javascripts/select-kit/addon/templates/components/mini-tag-chooser/mini-tag-chooser-header.hbs
rename to app/assets/javascripts/select-kit/app/templates/components/mini-tag-chooser/mini-tag-chooser-header.hbs
diff --git a/app/assets/javascripts/select-kit/addon/templates/components/mini-tag-chooser/selected-collection.hbs b/app/assets/javascripts/select-kit/app/templates/components/mini-tag-chooser/selected-collection.hbs
similarity index 100%
rename from app/assets/javascripts/select-kit/addon/templates/components/mini-tag-chooser/selected-collection.hbs
rename to app/assets/javascripts/select-kit/app/templates/components/mini-tag-chooser/selected-collection.hbs
diff --git a/app/assets/javascripts/select-kit/addon/templates/components/multi-select.hbs b/app/assets/javascripts/select-kit/app/templates/components/multi-select.hbs
similarity index 100%
rename from app/assets/javascripts/select-kit/addon/templates/components/multi-select.hbs
rename to app/assets/javascripts/select-kit/app/templates/components/multi-select.hbs
diff --git a/app/assets/javascripts/select-kit/addon/templates/components/multi-select/multi-select-header.hbs b/app/assets/javascripts/select-kit/app/templates/components/multi-select/multi-select-header.hbs
similarity index 100%
rename from app/assets/javascripts/select-kit/addon/templates/components/multi-select/multi-select-header.hbs
rename to app/assets/javascripts/select-kit/app/templates/components/multi-select/multi-select-header.hbs
diff --git a/app/assets/javascripts/select-kit/addon/templates/components/multi-select/selected-category.hbs b/app/assets/javascripts/select-kit/app/templates/components/multi-select/selected-category.hbs
similarity index 100%
rename from app/assets/javascripts/select-kit/addon/templates/components/multi-select/selected-category.hbs
rename to app/assets/javascripts/select-kit/app/templates/components/multi-select/selected-category.hbs
diff --git a/app/assets/javascripts/select-kit/addon/templates/components/notifications-filter/notifications-filter-header.hbs b/app/assets/javascripts/select-kit/app/templates/components/notifications-filter/notifications-filter-header.hbs
similarity index 100%
rename from app/assets/javascripts/select-kit/addon/templates/components/notifications-filter/notifications-filter-header.hbs
rename to app/assets/javascripts/select-kit/app/templates/components/notifications-filter/notifications-filter-header.hbs
diff --git a/app/assets/javascripts/select-kit/addon/templates/components/period-chooser/period-chooser-header.hbs b/app/assets/javascripts/select-kit/app/templates/components/period-chooser/period-chooser-header.hbs
similarity index 100%
rename from app/assets/javascripts/select-kit/addon/templates/components/period-chooser/period-chooser-header.hbs
rename to app/assets/javascripts/select-kit/app/templates/components/period-chooser/period-chooser-header.hbs
diff --git a/app/assets/javascripts/select-kit/addon/templates/components/period-chooser/period-chooser-row.hbs b/app/assets/javascripts/select-kit/app/templates/components/period-chooser/period-chooser-row.hbs
similarity index 100%
rename from app/assets/javascripts/select-kit/addon/templates/components/period-chooser/period-chooser-row.hbs
rename to app/assets/javascripts/select-kit/app/templates/components/period-chooser/period-chooser-row.hbs
diff --git a/app/assets/javascripts/select-kit/app/templates/components/pinned-button.hbs b/app/assets/javascripts/select-kit/app/templates/components/pinned-button.hbs
new file mode 100644
index 00000000000..f54bdb6b5fe
--- /dev/null
+++ b/app/assets/javascripts/select-kit/app/templates/components/pinned-button.hbs
@@ -0,0 +1,5 @@
+{{pinned-options value=pinned topic=topic}}
+
+<p class="reason">
+  {{html-safe reasonText}}
+</p>
diff --git a/app/assets/javascripts/select-kit/addon/templates/components/select-kit/errors-collection.hbs b/app/assets/javascripts/select-kit/app/templates/components/select-kit/errors-collection.hbs
similarity index 100%
rename from app/assets/javascripts/select-kit/addon/templates/components/select-kit/errors-collection.hbs
rename to app/assets/javascripts/select-kit/app/templates/components/select-kit/errors-collection.hbs
diff --git a/app/assets/javascripts/select-kit/addon/templates/components/select-kit/select-kit-body.hbs b/app/assets/javascripts/select-kit/app/templates/components/select-kit/select-kit-body.hbs
similarity index 100%
rename from app/assets/javascripts/select-kit/addon/templates/components/select-kit/select-kit-body.hbs
rename to app/assets/javascripts/select-kit/app/templates/components/select-kit/select-kit-body.hbs
diff --git a/app/assets/javascripts/select-kit/addon/templates/components/select-kit/select-kit-collection.hbs b/app/assets/javascripts/select-kit/app/templates/components/select-kit/select-kit-collection.hbs
similarity index 100%
rename from app/assets/javascripts/select-kit/addon/templates/components/select-kit/select-kit-collection.hbs
rename to app/assets/javascripts/select-kit/app/templates/components/select-kit/select-kit-collection.hbs
diff --git a/app/assets/javascripts/select-kit/addon/templates/components/select-kit/select-kit-filter.hbs b/app/assets/javascripts/select-kit/app/templates/components/select-kit/select-kit-filter.hbs
similarity index 100%
rename from app/assets/javascripts/select-kit/addon/templates/components/select-kit/select-kit-filter.hbs
rename to app/assets/javascripts/select-kit/app/templates/components/select-kit/select-kit-filter.hbs
diff --git a/app/assets/javascripts/select-kit/addon/templates/components/select-kit/select-kit-row.hbs b/app/assets/javascripts/select-kit/app/templates/components/select-kit/select-kit-row.hbs
similarity index 100%
rename from app/assets/javascripts/select-kit/addon/templates/components/select-kit/select-kit-row.hbs
rename to app/assets/javascripts/select-kit/app/templates/components/select-kit/select-kit-row.hbs
diff --git a/app/assets/javascripts/select-kit/addon/templates/components/select-kit/single-select-header.hbs b/app/assets/javascripts/select-kit/app/templates/components/select-kit/single-select-header.hbs
similarity index 100%
rename from app/assets/javascripts/select-kit/addon/templates/components/select-kit/single-select-header.hbs
rename to app/assets/javascripts/select-kit/app/templates/components/select-kit/single-select-header.hbs
diff --git a/app/assets/javascripts/select-kit/addon/templates/components/selected-name.hbs b/app/assets/javascripts/select-kit/app/templates/components/selected-name.hbs
similarity index 100%
rename from app/assets/javascripts/select-kit/addon/templates/components/selected-name.hbs
rename to app/assets/javascripts/select-kit/app/templates/components/selected-name.hbs
diff --git a/app/assets/javascripts/select-kit/addon/templates/components/single-select.hbs b/app/assets/javascripts/select-kit/app/templates/components/single-select.hbs
similarity index 100%
rename from app/assets/javascripts/select-kit/addon/templates/components/single-select.hbs
rename to app/assets/javascripts/select-kit/app/templates/components/single-select.hbs
diff --git a/app/assets/javascripts/select-kit/addon/templates/components/tag-chooser-row.hbs b/app/assets/javascripts/select-kit/app/templates/components/tag-chooser-row.hbs
similarity index 100%
rename from app/assets/javascripts/select-kit/addon/templates/components/tag-chooser-row.hbs
rename to app/assets/javascripts/select-kit/app/templates/components/tag-chooser-row.hbs
diff --git a/app/assets/javascripts/select-kit/addon/templates/components/tag-drop/tag-drop-header.hbs b/app/assets/javascripts/select-kit/app/templates/components/tag-drop/tag-drop-header.hbs
similarity index 100%
rename from app/assets/javascripts/select-kit/addon/templates/components/tag-drop/tag-drop-header.hbs
rename to app/assets/javascripts/select-kit/app/templates/components/tag-drop/tag-drop-header.hbs
diff --git a/app/assets/javascripts/select-kit/addon/templates/components/tag-row.hbs b/app/assets/javascripts/select-kit/app/templates/components/tag-row.hbs
similarity index 100%
rename from app/assets/javascripts/select-kit/addon/templates/components/tag-row.hbs
rename to app/assets/javascripts/select-kit/app/templates/components/tag-row.hbs
diff --git a/app/assets/javascripts/select-kit/addon/templates/components/toolbar-popup-menu-options/toolbar-popup-menu-options-heading.hbs b/app/assets/javascripts/select-kit/app/templates/components/toolbar-popup-menu-options/toolbar-popup-menu-options-heading.hbs
similarity index 100%
rename from app/assets/javascripts/select-kit/addon/templates/components/toolbar-popup-menu-options/toolbar-popup-menu-options-heading.hbs
rename to app/assets/javascripts/select-kit/app/templates/components/toolbar-popup-menu-options/toolbar-popup-menu-options-heading.hbs
diff --git a/app/assets/javascripts/select-kit/app/templates/components/topic-notifications-button.hbs b/app/assets/javascripts/select-kit/app/templates/components/topic-notifications-button.hbs
new file mode 100644
index 00000000000..50dd20e56eb
--- /dev/null
+++ b/app/assets/javascripts/select-kit/app/templates/components/topic-notifications-button.hbs
@@ -0,0 +1,17 @@
+{{topic-notifications-options
+  value=notificationLevel
+  topic=topic
+  onChange=(action "changeTopicNotificationLevel")
+  options=(hash
+    showFullTitle=showFullTitle
+    placement=placement
+    preventsClickPropagation=true
+    showCaret=showCaret
+  )
+}}
+
+{{#if appendReason}}
+  <p class="reason">
+    {{html-safe topic.details.notificationReasonText}}
+  </p>
+{{/if}}
diff --git a/app/assets/javascripts/select-kit/addon/templates/components/user-chooser/user-row.hbs b/app/assets/javascripts/select-kit/app/templates/components/user-chooser/user-row.hbs
similarity index 100%
rename from app/assets/javascripts/select-kit/addon/templates/components/user-chooser/user-row.hbs
rename to app/assets/javascripts/select-kit/app/templates/components/user-chooser/user-row.hbs
diff --git a/app/assets/javascripts/wizard-application.js b/app/assets/javascripts/wizard-application.js
index 4e2a7adc072..b8e8797f0c6 100644
--- a/app/assets/javascripts/wizard-application.js
+++ b/app/assets/javascripts/wizard-application.js
@@ -1,6 +1,6 @@
 //= require_tree ./discourse-common/addon
 //= require i18n-patches
-//= require_tree ./select-kit/addon
+//= require_tree ./select-kit/app
 //= require wizard/router
 //= require wizard/wizard
 //= require_tree ./wizard/templates
diff --git a/app/assets/stylesheets/common/base/_topic-list.scss b/app/assets/stylesheets/common/base/_topic-list.scss
index a80e54c4fda..aa51fccce15 100644
--- a/app/assets/stylesheets/common/base/_topic-list.scss
+++ b/app/assets/stylesheets/common/base/_topic-list.scss
@@ -53,6 +53,7 @@
     color: $primary-medium;
   }
   span.badge-category {
+    font-weight: normal;
     color: $primary-medium;
   }
   a.discourse-tag {
diff --git a/app/assets/stylesheets/common/base/alert.scss b/app/assets/stylesheets/common/base/alert.scss
index 05a29029059..d729cdc7423 100644
--- a/app/assets/stylesheets/common/base/alert.scss
+++ b/app/assets/stylesheets/common/base/alert.scss
@@ -3,7 +3,6 @@
   background-color: $danger-low;
   color: $primary;
   position: relative;
-  margin-bottom: 1em;
 
   .close {
     font-size: $font-up-3;
diff --git a/app/assets/stylesheets/common/base/crawler_layout.scss b/app/assets/stylesheets/common/base/crawler_layout.scss
index bff0addac1a..c279aceff4c 100644
--- a/app/assets/stylesheets/common/base/crawler_layout.scss
+++ b/app/assets/stylesheets/common/base/crawler_layout.scss
@@ -27,36 +27,6 @@ body.crawler {
 
   .topic-list {
     margin-bottom: 1em;
-    @media (max-width: 850px) {
-      td {
-        word-break: break-all;
-        &.posters {
-          a:not(:last-of-type) {
-            display: none;
-          }
-          a:last-of-type {
-            display: block;
-          }
-        }
-      }
-
-      td,
-      th {
-        &.views {
-          display: none;
-        }
-      }
-
-      .link-top-line {
-        a.title {
-          padding: 0;
-        }
-      }
-
-      .link-bottom-line {
-        margin-top: 0.25em;
-      }
-    }
   }
 
   footer {
diff --git a/app/assets/stylesheets/common/base/topic-post.scss b/app/assets/stylesheets/common/base/topic-post.scss
index 48c361c1647..6e465bbc6b6 100644
--- a/app/assets/stylesheets/common/base/topic-post.scss
+++ b/app/assets/stylesheets/common/base/topic-post.scss
@@ -1005,51 +1005,10 @@ a.mention-group {
 }
 
 #topic-footer-buttons {
-  padding: 0.5em 0;
-
-  .topic-footer-main-buttons {
-    margin: 0 0 -0.5em 0;
-    display: flex;
-    flex-wrap: wrap;
-
-    > .btn {
-      margin: 0 0.5em 0.5em 0;
-      display: inline-flex;
-      align-items: center;
-
-      .d-button-label {
-        display: flex;
-        flex: 1 0 auto;
-        align-items: center;
-      }
-    }
-
-    .topic-admin-menu-button-container {
-      display: inline-flex;
-    }
-
-    .topic-admin-menu-button-container > span:not(:empty) {
-      margin: 0 0.5em 0.5em 0;
-    }
-  }
-
-  .pinned-button:not(.is-hidden) + .topic-notifications-button {
-    margin-top: 0;
-  }
-
-  .pinned-button,
-  .topic-notifications-button {
-    margin: 1em 0;
-
-    .reason {
-      color: $primary-high;
-      display: inline-flex;
-      margin: 0;
-      align-items: center;
-
-      .text {
-        margin-left: 0.5em;
-      }
-    }
+  .reason {
+    color: $primary-high;
+    display: inline;
+    margin: 0 0 0 8px;
+    line-height: $line-height-medium;
   }
 }
diff --git a/app/assets/stylesheets/common/base/user.scss b/app/assets/stylesheets/common/base/user.scss
index 4d5e9f42886..587af3c3539 100644
--- a/app/assets/stylesheets/common/base/user.scss
+++ b/app/assets/stylesheets/common/base/user.scss
@@ -653,9 +653,6 @@
     padding: 5px 0;
     font-weight: bold;
   }
-  .save-theme-alert {
-    font-size: $font-down-1;
-  }
 }
 
 .paginated-topics-list {
diff --git a/app/assets/stylesheets/common/components/badges.scss b/app/assets/stylesheets/common/components/badges.scss
index 20ed535931d..3881ee7b70f 100644
--- a/app/assets/stylesheets/common/components/badges.scss
+++ b/app/assets/stylesheets/common/components/badges.scss
@@ -17,6 +17,7 @@
 
 .badge-wrapper {
   font-size: $font-down-1;
+  font-weight: bold;
   white-space: nowrap;
   position: relative;
   display: inline-flex;
diff --git a/app/assets/stylesheets/common/select-kit/category-row.scss b/app/assets/stylesheets/common/select-kit/category-row.scss
index df43c956035..2bbe33c96ea 100644
--- a/app/assets/stylesheets/common/select-kit/category-row.scss
+++ b/app/assets/stylesheets/common/select-kit/category-row.scss
@@ -9,9 +9,6 @@
       -ms-flex: 1 1 auto;
       flex: 1 1 auto;
     }
-    .category-desc p {
-      margin: 0;
-    }
     .category-status {
       .badge-wrapper.box {
         margin-bottom: 1px;
diff --git a/app/assets/stylesheets/common/select-kit/pinned-button.scss b/app/assets/stylesheets/common/select-kit/pinned-button.scss
index 3e51092ae39..f080b8a016c 100644
--- a/app/assets/stylesheets/common/select-kit/pinned-button.scss
+++ b/app/assets/stylesheets/common/select-kit/pinned-button.scss
@@ -1,7 +1,28 @@
 #topic-footer-buttons {
   .pinned-button {
+    min-width: auto;
+    margin: 1em 0;
+
     &.is-hidden {
       display: none;
     }
+
+    .btn {
+      margin: 0;
+    }
+
+    .reason {
+      display: inline;
+      line-height: $line-height-medium;
+    }
+  }
+}
+
+.pinned-button {
+  margin: 0;
+  min-width: auto;
+
+  .pinned-options {
+    display: inline;
   }
 }
diff --git a/app/assets/stylesheets/common/select-kit/select-kit.scss b/app/assets/stylesheets/common/select-kit/select-kit.scss
index a9769b59710..130bad52f80 100644
--- a/app/assets/stylesheets/common/select-kit/select-kit.scss
+++ b/app/assets/stylesheets/common/select-kit/select-kit.scss
@@ -63,11 +63,6 @@
     flex-direction: row;
     min-height: 30px;
 
-    .d-icon-spinner {
-      -webkit-animation: rotate-forever 1s infinite linear;
-      animation: rotate-forever 1s infinite linear;
-    }
-
     .selected-name {
       text-align: left;
       flex: 0 1 auto;
diff --git a/app/assets/stylesheets/common/select-kit/topic-notifications-button.scss b/app/assets/stylesheets/common/select-kit/topic-notifications-button.scss
index b3808031a1d..1e7c7972054 100644
--- a/app/assets/stylesheets/common/select-kit/topic-notifications-button.scss
+++ b/app/assets/stylesheets/common/select-kit/topic-notifications-button.scss
@@ -1,18 +1,27 @@
-.topic-notifications-button {
-  &.is-loading {
-    pointer-events: none;
-    user-select: none;
+#topic-footer-buttons {
+  .topic-notifications-button {
+    min-width: auto;
+    margin: 1em 0;
 
-    .d-icon-spinner {
+    .btn {
       margin: 0;
     }
 
-    .selected-name .d-icon {
-      display: none;
-    }
-
-    .topic-notifications-options {
-      opacity: 0.5;
+    .reason {
+      display: inline;
+      line-height: $line-height-medium;
     }
   }
 }
+
+.topic-notifications-button .topic-notifications-options {
+  min-width: auto;
+}
+
+.topic-notifications-button {
+  margin: 0;
+
+  .topic-notifications-options {
+    display: inline-flex;
+  }
+}
diff --git a/app/assets/stylesheets/desktop.scss b/app/assets/stylesheets/desktop.scss
index e9213e897b3..70229afbbc1 100644
--- a/app/assets/stylesheets/desktop.scss
+++ b/app/assets/stylesheets/desktop.scss
@@ -1,6 +1,24 @@
 @import "common";
 
-@import "desktop/*";
+/* @import "desktop/*"; TODO: get this working again */
+
+@import "desktop/alert";
+@import "desktop/banner";
+@import "desktop/compose";
+@import "desktop/discourse";
+@import "desktop/header";
+@import "desktop/login";
+@import "desktop/modal";
+@import "desktop/category-list";
+@import "desktop/latest-topic-list";
+@import "desktop/topic-list";
+@import "desktop/topic-post";
+@import "desktop/topic";
+@import "desktop/upload";
+@import "desktop/user";
+@import "desktop/history";
+@import "desktop/group";
+@import "desktop/admin_customize";
 
 // Import all component-specific files
 @import "desktop/components/*";
diff --git a/app/assets/stylesheets/desktop/alert.scss b/app/assets/stylesheets/desktop/alert.scss
new file mode 100644
index 00000000000..f3f57eac668
--- /dev/null
+++ b/app/assets/stylesheets/desktop/alert.scss
@@ -0,0 +1,3 @@
+.alert {
+  margin-bottom: 1em;
+}
diff --git a/app/assets/stylesheets/desktop/topic-post.scss b/app/assets/stylesheets/desktop/topic-post.scss
index 5adc17d3eb1..ca304b8e951 100644
--- a/app/assets/stylesheets/desktop/topic-post.scss
+++ b/app/assets/stylesheets/desktop/topic-post.scss
@@ -451,15 +451,20 @@ pre.copy-codeblocks:hover .copy-cmd {
   }
 }
 
-#topic-footer-buttons {
-  max-width: calc(690px + (11px * 2) + 45px);
+@mixin topic-footer-button {
+  margin-bottom: 5px;
+  margin-right: 10px;
+}
 
-  .bookmark {
+#topic-footer-buttons {
+  padding: 10px 10px 0 0;
+  float: left;
+  .btn {
+    @include topic-footer-button;
     .d-icon-bookmark.bookmarked {
       color: $tertiary;
     }
   }
-
   .bookmark.bookmarked .d-icon-bookmark,
   .bookmark.bookmarked .d-icon-discourse-bookmark-clock {
     color: $tertiary;
@@ -469,6 +474,10 @@ pre.copy-codeblocks:hover .copy-cmd {
   }
 }
 
+#topic-footer-button {
+  width: 757px;
+}
+
 .suggested-topics {
   clear: left;
   padding: 20px 0 15px 0;
diff --git a/app/assets/stylesheets/mobile.scss b/app/assets/stylesheets/mobile.scss
index a3202ca43c1..ee9c3ed92df 100644
--- a/app/assets/stylesheets/mobile.scss
+++ b/app/assets/stylesheets/mobile.scss
@@ -1,6 +1,37 @@
 @import "common";
 
-@import "mobile/*";
+/* @import "mobile/*"; TODO: get this working again */
+
+@import "mobile/buttons";
+@import "mobile/alert";
+@import "mobile/banner";
+@import "mobile/compose";
+@import "mobile/discourse";
+@import "mobile/header";
+@import "mobile/login";
+@import "mobile/modal";
+@import "mobile/topic-list";
+@import "mobile/topic-post";
+@import "mobile/topic";
+@import "mobile/upload";
+@import "mobile/user";
+@import "mobile/history";
+@import "mobile/lightbox";
+@import "mobile/directory";
+@import "mobile/search";
+@import "mobile/emoji";
+@import "mobile/ring";
+@import "mobile/group";
+@import "mobile/dashboard";
+@import "mobile/admin_badges";
+@import "mobile/admin_customize";
+@import "mobile/admin_reports";
+@import "mobile/admin_report";
+@import "mobile/admin_report_table";
+@import "mobile/admin_report_counters";
+@import "mobile/admin_emojis";
+@import "mobile/menu-panel";
+@import "mobile/reviewables";
 
 // Import all component-specific files
 @import "mobile/components/*";
diff --git a/app/assets/stylesheets/mobile/alert.scss b/app/assets/stylesheets/mobile/alert.scss
index 12e60245e57..0ee9b44ee0e 100644
--- a/app/assets/stylesheets/mobile/alert.scss
+++ b/app/assets/stylesheets/mobile/alert.scss
@@ -1,8 +1,7 @@
+// there are (n) new or updated topics, click to show
 .alert.alert-info {
-  margin-bottom: 0.5em;
+  margin: 0;
   &.clickable {
-    // there are (n) new or updated topics, click to show
-    margin-bottom: 0;
     padding: 1em;
   }
 }
diff --git a/app/assets/stylesheets/mobile/banner.scss b/app/assets/stylesheets/mobile/banner.scss
index fc308f05880..852b2847364 100644
--- a/app/assets/stylesheets/mobile/banner.scss
+++ b/app/assets/stylesheets/mobile/banner.scss
@@ -3,6 +3,11 @@
 // --------------------------------------------------
 
 #banner {
+  // go full width on mobile, by extending into the 10px wrap
+  // borders on left and right
+  margin: 0 -10px;
   max-height: 180px;
-  height: 20vh;
+  @media all and (max-height: 499px) {
+    max-height: 100px;
+  }
 }
diff --git a/app/assets/stylesheets/mobile/discourse.scss b/app/assets/stylesheets/mobile/discourse.scss
index c9406abca6b..260f8d4b13f 100644
--- a/app/assets/stylesheets/mobile/discourse.scss
+++ b/app/assets/stylesheets/mobile/discourse.scss
@@ -63,6 +63,11 @@ blockquote {
   margin-bottom: 9px;
 }
 
+// categories should not be bold on mobile; they fight with the topic title too much
+.badge-wrapper {
+  font-weight: normal;
+}
+
 .mobile-nav {
   margin: 0;
   padding: 0;
diff --git a/app/assets/stylesheets/mobile/topic-post.scss b/app/assets/stylesheets/mobile/topic-post.scss
index d84b4a727cf..9cd4931ce83 100644
--- a/app/assets/stylesheets/mobile/topic-post.scss
+++ b/app/assets/stylesheets/mobile/topic-post.scss
@@ -36,7 +36,6 @@ span.badge-posts {
     .double-button {
       display: flex;
       flex: 0 1 auto;
-      align-items: center;
       button {
         &.like,
         &.read-indicator,
@@ -236,16 +235,20 @@ a.reply-to-tab {
 }
 
 #topic-footer-buttons {
+  @include clearfix;
+  padding: 20px 0 0 0;
   .d-icon-bookmark.bookmarked,
   .d-icon-discourse-bookmark-clock.bookmarked {
     color: $tertiary;
   }
-
-  .topic-footer-mobile-dropdown {
-    margin: 0 0.5em 0.5em 0;
+  .combobox {
+    margin-right: 0.5em;
     width: 160px;
+    margin-bottom: 0.5em;
   }
+}
 
+#topic-footer-buttons {
   .topic-notifications-button,
   .pinned-button {
     display: flex;
@@ -260,6 +263,11 @@ a.reply-to-tab {
   }
 }
 
+#topic-footer-button {
+  width: 100px;
+  margin: 0 auto;
+}
+
 .suggested-topics {
   clear: left;
   padding: 20px 0 15px 0;
@@ -284,6 +292,13 @@ span.post-count {
   opacity: 0.8;
 }
 
+#topic-footer-buttons {
+  .btn {
+    margin-bottom: 0.5em;
+    margin-right: 0.5em;
+  }
+}
+
 #topic-title {
   z-index: z("base") + 1;
   margin: 0 0 0 0 !important;
diff --git a/app/controllers/about_controller.rb b/app/controllers/about_controller.rb
index 3f3f9e15a36..fe2d3a2327d 100644
--- a/app/controllers/about_controller.rb
+++ b/app/controllers/about_controller.rb
@@ -16,7 +16,7 @@ class AboutController < ApplicationController
         render :index
       end
       format.json do
-        render_json_dump(AboutSerializer.new(@about, scope: guardian))
+        render_serialized(@about, AboutSerializer)
       end
     end
   end
diff --git a/app/controllers/list_controller.rb b/app/controllers/list_controller.rb
index 5eadbbcf6d7..81511387f73 100644
--- a/app/controllers/list_controller.rb
+++ b/app/controllers/list_controller.rb
@@ -331,13 +331,7 @@ class ListController < ApplicationController
 
     params[:category] = @category.id.to_s
 
-    @description_meta = if @category.uncategorized?
-      I18n.t('category.uncategorized_description', locale: SiteSetting.default_locale)
-    else
-      @category.description_text
-    end
-    @description_meta = SiteSetting.site_description if @description_meta.blank?
-
+    @description_meta = @category.description_text
     if !guardian.can_see?(@category)
       if SiteSetting.detailed_404
         raise Discourse::InvalidAccess
diff --git a/app/controllers/themes_controller.rb b/app/controllers/themes_controller.rb
new file mode 100644
index 00000000000..6520ec70975
--- /dev/null
+++ b/app/controllers/themes_controller.rb
@@ -0,0 +1,31 @@
+# frozen_string_literal: true
+
+class ThemesController < ::ApplicationController
+  def assets
+    theme_ids = params[:ids].to_s.split("-").map(&:to_i)
+
+    if params[:ids] == "default"
+      theme_ids = nil
+    else
+      raise Discourse::NotFound unless guardian.allow_themes?(theme_ids)
+    end
+
+    targets = view_context.mobile_view? ? [:mobile, :mobile_theme] : [:desktop, :desktop_theme]
+    targets << :admin if guardian.is_staff?
+    targets.append(*Discourse.find_plugin_css_assets(mobile_view: true, desktop_view: true))
+
+    object = targets.map do |target|
+      Stylesheet::Manager.stylesheet_data(target, theme_ids).map do |hash|
+        next hash unless Rails.env.development?
+
+        dup_hash = hash.dup
+        dup_hash[:new_href] = dup_hash[:new_href].dup
+        dup_hash[:new_href] << (dup_hash[:new_href].include?("?") ? "&" : "?")
+        dup_hash[:new_href] << SecureRandom.hex
+        dup_hash
+      end
+    end.flatten
+
+    render json: object.as_json
+  end
+end
diff --git a/app/helpers/email_helper.rb b/app/helpers/email_helper.rb
index 14364d45c32..c579473a4d2 100644
--- a/app/helpers/email_helper.rb
+++ b/app/helpers/email_helper.rb
@@ -25,8 +25,12 @@ module EmailHelper
     raw "<a href='#{Discourse.base_url}#{url}' style='color: ##{@anchor_color}'>#{title}</a>"
   end
 
-  def email_html_template
-    EmailStyle.new.html.sub('%{email_content}', yield).html_safe
+  def email_html_template(binding_arg)
+    template = EmailStyle.new.html.sub(
+      '%{email_content}',
+      '<%= yield %><% if defined?(html_body) %><%= html_body %><% end %>'
+    )
+    ERB.new(template).result(binding_arg)
   end
 
   protected
diff --git a/app/models/application_request.rb b/app/models/application_request.rb
index 3d0d8ae905f..52a6a8a87e0 100644
--- a/app/models/application_request.rb
+++ b/app/models/application_request.rb
@@ -16,16 +16,15 @@ class ApplicationRequest < ActiveRecord::Base
   include CachedCounting
 
   def self.disable
-    @disabled = true
+    @enabled = false
   end
 
   def self.enable
-    @disabled = false
+    @enabled = true
   end
 
   def self.increment!(type, opts = nil)
-    return if @disabled
-    perform_increment!(redis_key(type), opts)
+    perform_increment!(redis_key(type), opts) if @enabled
   end
 
   def self.write_cache!(date = nil)
diff --git a/app/models/category.rb b/app/models/category.rb
index 6ecfe9d3afe..63db814752e 100644
--- a/app/models/category.rb
+++ b/app/models/category.rb
@@ -709,29 +709,37 @@ class Category < ActiveRecord::Base
     ].include? id
   end
 
-  def full_slug(separator = "-")
-    start_idx = "#{Discourse.base_uri}/c/".size
-    url[start_idx..-1].gsub("/", separator)
-  end
-
-  @@url_cache = DistributedCache.new("category_url")
+  @@url_cache = DistributedCache.new('category_url')
 
   def clear_url_cache
     @@url_cache.clear
   end
 
+  def full_slug(separator = "-")
+    start_idx = "#{Discourse.base_uri}/c/".length
+    url[start_idx..-1].gsub("/", separator)
+  end
+
   def url
-    @@url_cache[self.id] ||= "#{Discourse.base_uri}/c/#{slug_path.join('/')}"
+    url = @@url_cache[self.id]
+    unless url
+      url = "#{Discourse.base_uri}/c/#{slug_path.join('/')}"
+
+      @@url_cache[self.id] = url
+    end
+
+    url
   end
 
   def url_with_id
     self.parent_category ? "#{url}/#{self.id}" : "#{Discourse.base_uri}/c/#{self.slug}/#{self.id}"
   end
 
-  # If the name changes, try and update the category definition topic too if it's an exact match
+  # If the name changes, try and update the category definition topic too if it's
+  # an exact match
   def rename_category_definition
-    return unless topic.present?
     old_name = saved_changes.transform_values(&:first)["name"]
+    return unless topic.present?
     if topic.title == I18n.t("category.topic_prefix", category: old_name)
       topic.update_attribute(:title, I18n.t("category.topic_prefix", category: name))
     end
diff --git a/app/models/global_setting.rb b/app/models/global_setting.rb
index 21e5a137dcf..f4425919ed3 100644
--- a/app/models/global_setting.rb
+++ b/app/models/global_setting.rb
@@ -164,15 +164,9 @@ class GlobalSetting
         c[:port] = redis_port if redis_port
 
         if redis_slave_host && redis_slave_port
-          if ENV["RAILS_FAILOVER"]
-            c[:replica_host] = redis_slave_host
-            c[:replica_port] = redis_slave_port
-            c[:connector] = RailsFailover::Redis::Connector
-          else
-            c[:slave_host] = redis_slave_host
-            c[:slave_port] = redis_slave_port
-            c[:connector] = DiscourseRedis::Connector
-          end
+          c[:slave_host] = redis_slave_host
+          c[:slave_port] = redis_slave_port
+          c[:connector] = DiscourseRedis::Connector
         end
 
         c[:password] = redis_password if redis_password.present?
@@ -194,15 +188,9 @@ class GlobalSetting
         c[:port] = message_bus_redis_port if message_bus_redis_port
 
         if message_bus_redis_slave_host && message_bus_redis_slave_port
-          if ENV["RAILS_FAILOVER"]
-            c[:replica_host] = message_bus_redis_slave_host
-            c[:replica_port] = message_bus_redis_slave_port
-            c[:connector] = RailsFailover::Redis::Connector
-          else
-            c[:slave_host] = message_bus_redis_slave_host
-            c[:slave_port] = message_bus_redis_slave_port
-            c[:connector] = DiscourseRedis::Connector
-          end
+          c[:slave_host] = message_bus_redis_slave_host
+          c[:slave_port] = message_bus_redis_slave_port
+          c[:connector] = DiscourseRedis::Connector
         end
 
         c[:password] = message_bus_redis_password if message_bus_redis_password.present?
diff --git a/app/models/group_archived_message.rb b/app/models/group_archived_message.rb
index 8199a53cf62..1715a57585f 100644
--- a/app/models/group_archived_message.rb
+++ b/app/models/group_archived_message.rb
@@ -1,7 +1,7 @@
 # frozen_string_literal: true
 
 class GroupArchivedMessage < ActiveRecord::Base
-  belongs_to :group
+  belongs_to :user
   belongs_to :topic
 
   def self.move_to_inbox!(group_id, topic)
diff --git a/app/models/post.rb b/app/models/post.rb
index e1a3a1f391e..89dbbcfebba 100644
--- a/app/models/post.rb
+++ b/app/models/post.rb
@@ -159,6 +159,14 @@ class Post < ActiveRecord::Base
     includes(:post_details).find_by(post_details: { key: key, value: value })
   end
 
+  def self.excerpt_size=(sz)
+    @excerpt_size = sz
+  end
+
+  def self.excerpt_size
+    @excerpt_size || 220
+  end
+
   def whisper?
     post_type == Post.types[:whisper]
   end
@@ -474,7 +482,7 @@ class Post < ActiveRecord::Base
   end
 
   def excerpt_for_topic
-    Post.excerpt(cooked, SiteSetting.topic_excerpt_maxlength, strip_links: true, strip_images: true, post: self)
+    Post.excerpt(cooked, Post.excerpt_size, strip_links: true, strip_images: true, post: self)
   end
 
   def is_first_post?
@@ -650,10 +658,6 @@ class Post < ActiveRecord::Base
       baked_version: BAKED_VERSION
     )
 
-    if is_first_post?
-      topic.update_excerpt(excerpt_for_topic)
-    end
-
     if invalidate_broken_images
       custom_fields.delete(BROKEN_IMAGES)
       save_custom_fields
diff --git a/app/models/topic.rb b/app/models/topic.rb
index 38affdb327b..d331a308060 100644
--- a/app/models/topic.rb
+++ b/app/models/topic.rb
@@ -33,11 +33,11 @@ class Topic < ActiveRecord::Base
   end
 
   def self.thumbnail_sizes
-    [ self.share_thumbnail_size ] + DiscoursePluginRegistry.topic_thumbnail_sizes
+    [ self.share_thumbnail_size ]
   end
 
-  def thumbnail_job_redis_key(sizes)
-    "generate_topic_thumbnail_enqueue_#{id}_#{sizes.inspect}"
+  def thumbnail_job_redis_key(extra_sizes)
+    "generate_topic_thumbnail_enqueue_#{id}_#{extra_sizes.inspect}"
   end
 
   def filtered_topic_thumbnails(extra_sizes: [])
@@ -79,7 +79,7 @@ class Topic < ActiveRecord::Base
     if SiteSetting.create_thumbnails &&
        enqueue_if_missing &&
        records.length < thumbnail_sizes.length &&
-       Discourse.redis.set(thumbnail_job_redis_key(thumbnail_sizes), 1, nx: true, ex: 1.minute)
+       Discourse.redis.set(thumbnail_job_redis_key(extra_sizes), 1, nx: true, ex: 1.minute)
 
       Jobs.enqueue(:generate_topic_thumbnails, { topic_id: id, extra_sizes: extra_sizes })
     end
@@ -1476,13 +1476,6 @@ class Topic < ActiveRecord::Base
     private_topic
   end
 
-  def update_excerpt(excerpt)
-    update_column(:excerpt, excerpt)
-    if archetype == "banner"
-      ApplicationController.banner_json_cache.clear
-    end
-  end
-
   def pm_with_non_human_user?
     sql = <<~SQL
     SELECT 1 FROM topics
diff --git a/app/models/topic_embed.rb b/app/models/topic_embed.rb
index 362ee79f4ac..a18e5b85dea 100644
--- a/app/models/topic_embed.rb
+++ b/app/models/topic_embed.rb
@@ -109,8 +109,6 @@ class TopicEmbed < ActiveRecord::Base
 
     url = UrlHelper.escape_uri(url)
     original_uri = URI.parse(url)
-    raise URI::InvalidURIError unless original_uri.is_a?(URI::HTTP)
-
     opts = {
       tags: %w[div p code pre h1 h2 h3 b em i strong a img ul li ol blockquote],
       attributes: %w[href src class],
diff --git a/app/models/upload.rb b/app/models/upload.rb
index 31c931c172b..bb4e7976f5e 100644
--- a/app/models/upload.rb
+++ b/app/models/upload.rb
@@ -448,3 +448,7 @@ end
 #  index_uploads_on_url                     (url)
 #  index_uploads_on_user_id                 (user_id)
 #
+# Foreign Keys
+#
+#  fk_rails_...  (access_control_post_id => posts.id)
+#
diff --git a/app/models/user.rb b/app/models/user.rb
index d9678d1a1c7..9d682a62bd8 100644
--- a/app/models/user.rb
+++ b/app/models/user.rb
@@ -7,95 +7,102 @@ class User < ActiveRecord::Base
   include SecondFactorManager
   include HasDestroyedWebHook
 
-  DEFAULT_FEATURED_BADGE_COUNT = 3
-
-  # not deleted on user delete
   has_many :posts
-  has_many :topics
-  has_many :uploads
-
+  has_many :notifications, dependent: :delete_all
+  has_many :topic_users, dependent: :delete_all
   has_many :category_users, dependent: :destroy
   has_many :tag_users, dependent: :destroy
   has_many :user_api_keys, dependent: :destroy
-  has_many :topic_allowed_users, dependent: :destroy
-  has_many :user_archived_messages, dependent: :destroy
-  has_many :email_change_requests, dependent: :destroy
-  has_many :email_tokens, dependent: :destroy
-  has_many :invites, dependent: :destroy
-  has_many :topic_links, dependent: :destroy
-  has_many :user_uploads, dependent: :destroy
-  has_many :user_emails, dependent: :destroy
-  has_many :user_associated_accounts, dependent: :destroy
-  has_many :oauth2_user_infos, dependent: :destroy
-  has_many :user_second_factors, dependent: :destroy
-  has_many :user_badges, -> { for_enabled_badges }, dependent: :destroy
-  has_many :user_auth_tokens, dependent: :destroy
-  has_many :group_users, dependent: :destroy
-  has_many :user_warnings, dependent: :destroy
-  has_many :api_keys, dependent: :destroy
-  has_many :push_subscriptions, dependent: :destroy
-  has_many :acting_group_histories, dependent: :destroy, foreign_key: :acting_user_id, class_name: 'GroupHistory'
-  has_many :targeted_group_histories, dependent: :destroy, foreign_key: :target_user_id, class_name: 'GroupHistory'
-  has_many :reviewable_scores, dependent: :destroy
+  has_many :topics
+  has_many :bookmarks
 
-  has_one :user_option, dependent: :destroy
-  has_one :user_avatar, dependent: :destroy
-  has_one :github_user_info, dependent: :destroy
-  has_one :primary_email, -> { where(primary: true)  }, class_name: 'UserEmail', dependent: :destroy
-  has_one :user_stat, dependent: :destroy
-  has_one :user_profile, dependent: :destroy, inverse_of: :user
-  has_one :single_sign_on_record, dependent: :destroy
-  has_one :anonymous_user_master, class_name: 'AnonymousUser', dependent: :destroy
-  has_one :anonymous_user_shadow, ->(record) { where(active: true) }, foreign_key: :master_user_id, class_name: 'AnonymousUser', dependent: :destroy
-
-  # delete all is faster but bypasses callbacks
-  has_many :bookmarks, dependent: :delete_all
-  has_many :notifications, dependent: :delete_all
-  has_many :topic_users, dependent: :delete_all
-  has_many :email_logs, dependent: :delete_all
-  has_many :incoming_emails, dependent: :delete_all
-  has_many :user_visits, dependent: :delete_all
-  has_many :user_auth_token_logs, dependent: :delete_all
-  has_many :group_requests, dependent: :delete_all
-  has_many :muted_user_records, class_name: 'MutedUser', dependent: :delete_all
-  has_many :ignored_user_records, class_name: 'IgnoredUser', dependent: :delete_all
-
-  # dependent deleting handled via before_destroy (special cases)
+  # dependent deleting handled via before_destroy
   has_many :user_actions
   has_many :post_actions
-  has_many :post_timings
-  has_many :directory_items
-  has_many :security_keys, -> {
-    where(enabled: true)
-  }, class_name: "UserSecurityKey"
 
+  DEFAULT_FEATURED_BADGE_COUNT = 3
+
+  has_many :user_badges, -> { for_enabled_badges }, dependent: :destroy
   has_many :badges, through: :user_badges
   has_many :default_featured_user_badges,
             -> { for_enabled_badges.grouped_with_count.where("featured_rank <= ?", DEFAULT_FEATURED_BADGE_COUNT) },
             class_name: "UserBadge"
 
+  has_many :email_logs, dependent: :delete_all
+  has_many :incoming_emails, dependent: :delete_all
+  has_many :post_timings
+  has_many :topic_allowed_users, dependent: :destroy
   has_many :topics_allowed, through: :topic_allowed_users, source: :topic
+  has_many :email_tokens, dependent: :destroy
+  has_many :user_visits, dependent: :destroy
+  has_many :invites, dependent: :destroy
+  has_many :topic_links, dependent: :destroy
+  has_many :uploads
+  has_many :user_warnings
+  has_many :user_archived_messages, dependent: :destroy
+  has_many :email_change_requests, dependent: :destroy
+
+  # see before_destroy
+  has_many :directory_items
+  has_many :user_auth_tokens, dependent: :destroy
+  has_many :user_auth_token_logs, dependent: :destroy
+
+  has_many :group_users, dependent: :destroy
   has_many :groups, through: :group_users
+  has_many :group_requests, dependent: :destroy
   has_many :secure_categories, through: :groups, source: :categories
 
-  # deleted in user_second_factors relationship
+  has_many :user_uploads, dependent: :destroy
+  has_many :user_emails, dependent: :destroy
+
+  has_one :primary_email, -> { where(primary: true)  }, class_name: 'UserEmail', dependent: :destroy
+
+  has_one :user_option, dependent: :destroy
+  has_one :user_avatar, dependent: :destroy
+  has_many :user_associated_accounts, dependent: :destroy
+  has_one :github_user_info, dependent: :destroy
+  has_many :oauth2_user_infos, dependent: :destroy
+  has_many :user_second_factors, dependent: :destroy
+
   has_many :totps, -> {
     where(method: UserSecondFactor.methods[:totp], enabled: true)
   }, class_name: "UserSecondFactor"
 
+  has_many :security_keys, -> {
+    where(enabled: true)
+  }, class_name: "UserSecurityKey"
+
+  has_one :anonymous_user_master, class_name: 'AnonymousUser'
+  has_one :anonymous_user_shadow, ->(record) { where(active: true) }, foreign_key: :master_user_id, class_name: 'AnonymousUser'
+
   has_one :master_user, through: :anonymous_user_master
   has_one :shadow_user, through: :anonymous_user_shadow, source: :user
 
+  has_one :user_stat, dependent: :destroy
+  has_one :user_profile, dependent: :destroy, inverse_of: :user
   has_one :profile_background_upload, through: :user_profile
   has_one :card_background_upload, through: :user_profile
+  has_one :single_sign_on_record, dependent: :destroy
   belongs_to :approved_by, class_name: 'User'
   belongs_to :primary_group, class_name: 'Group'
 
+  has_many :muted_user_records, class_name: 'MutedUser'
   has_many :muted_users, through: :muted_user_records
+
+  has_many :ignored_user_records, class_name: 'IgnoredUser'
   has_many :ignored_users, through: :ignored_user_records
 
+  has_many :api_keys, dependent: :destroy
+
+  has_many :push_subscriptions, dependent: :destroy
+
   belongs_to :uploaded_avatar, class_name: 'Upload'
 
+  has_many :acting_group_histories, dependent: :destroy, foreign_key: :acting_user_id, class_name: 'GroupHistory'
+  has_many :targeted_group_histories, dependent: :destroy, foreign_key: :target_user_id, class_name: 'GroupHistory'
+
+  has_many :reviewable_scores, dependent: :destroy
+
   delegate :last_sent_email_address, to: :email_logs
 
   validates_presence_of :username
@@ -157,9 +164,6 @@ class User < ActiveRecord::Base
     DirectoryItem.where(user_id: self.id)
       .where('period_type in (?)', DirectoryItem.period_types.values)
       .delete_all
-
-    # our relationship filters on enabled, this makes sure everything is deleted
-    UserSecurityKey.where(user_id: self.id).delete_all
   end
 
   # Skip validating email, for example from a particular auth provider plugin
@@ -929,7 +933,7 @@ class User < ActiveRecord::Base
 
   def activate
     if email_token = self.email_tokens.active.where(email: self.email).first
-      EmailToken.confirm(email_token.token, skip_reviewable: true)
+      user = EmailToken.confirm(email_token.token, skip_reviewable: true)
     end
     self.update!(active: true)
     create_reviewable
@@ -1115,9 +1119,10 @@ class User < ActiveRecord::Base
   end
 
   def number_of_rejected_posts
-    ReviewableQueuedPost
-      .where(status: Reviewable.statuses[:rejected])
-      .where(created_by_id: self.id)
+    Post.with_deleted
+      .where(user_id: self.id)
+      .joins('INNER JOIN reviewables r ON posts.id = r.target_id')
+      .where(r: { status: Reviewable.statuses[:rejected], type: ReviewableQueuedPost.name })
       .count
   end
 
diff --git a/app/models/user_avatar.rb b/app/models/user_avatar.rb
index bd2751d6b45..f6dbf133126 100644
--- a/app/models/user_avatar.rb
+++ b/app/models/user_avatar.rb
@@ -5,14 +5,6 @@ class UserAvatar < ActiveRecord::Base
   belongs_to :gravatar_upload, class_name: 'Upload'
   belongs_to :custom_upload, class_name: 'Upload'
 
-  @@custom_user_gravatar_email_hash = {
-    Discourse::SYSTEM_USER_ID => User.email_hash("info@discourse.org")
-  }
-
-  def self.register_custom_user_gravatar_email_hash(user_id, email)
-    @@custom_user_gravatar_email_hash[user_id] = User.email_hash(email)
-  end
-
   def contains_upload?(id)
     gravatar_upload_id == id || custom_upload_id == id
   end
@@ -20,14 +12,14 @@ class UserAvatar < ActiveRecord::Base
   def update_gravatar!
     DistributedMutex.synchronize("update_gravatar_#{user_id}") do
       begin
-        self.update!(last_gravatar_download_attempt: Time.zone.now)
+        self.update!(last_gravatar_download_attempt: Time.now)
 
         max = Discourse.avatar_sizes.max
 
         # The user could be deleted before this executes
         return if user.blank? || user.primary_email.blank?
 
-        email_hash = @@custom_user_gravatar_email_hash[user_id] || user.email_hash
+        email_hash = user_id == Discourse::SYSTEM_USER_ID ? User.email_hash("info@discourse.org") : user.email_hash
         gravatar_url = "https://#{SiteSetting.gravatar_base_url}/avatar/#{email_hash}.png?s=#{max}&d=404&reset_cache=#{SecureRandom.urlsafe_base64(5)}"
 
         # follow redirects in case gravatar change rules on us
diff --git a/app/models/web_hook_event_type.rb b/app/models/web_hook_event_type.rb
index 442f14cb8ce..952c1c2062c 100644
--- a/app/models/web_hook_event_type.rb
+++ b/app/models/web_hook_event_type.rb
@@ -7,6 +7,8 @@ class WebHookEventType < ActiveRecord::Base
   GROUP = 4
   CATEGORY = 5
   TAG = 6
+  FLAG = 7
+  QUEUED_POST = 8
   REVIEWABLE = 9
   NOTIFICATION = 10
   SOLVED = 11
diff --git a/app/serializers/about_serializer.rb b/app/serializers/about_serializer.rb
index 8230c590a4c..308f990fd6c 100644
--- a/app/serializers/about_serializer.rb
+++ b/app/serializers/about_serializer.rb
@@ -21,16 +21,7 @@ class AboutSerializer < ApplicationSerializer
              :title,
              :locale,
              :version,
-             :https,
-             :can_see_about_stats
-
-  def can_see_about_stats
-    scope.can_see_about_stats?
-  end
-
-  def include_stats?
-    can_see_about_stats
-  end
+             :https
 
   def stats
     object.class.fetch_cached_stats || Jobs::AboutStats.new.execute({})
diff --git a/app/services/badge_granter.rb b/app/services/badge_granter.rb
index a5027c53030..e402fb880cc 100644
--- a/app/services/badge_granter.rb
+++ b/app/services/badge_granter.rb
@@ -3,11 +3,11 @@
 class BadgeGranter
 
   def self.disable_queue
-    @queue_disabled = true
+    @queue_enabled = false
   end
 
   def self.enable_queue
-    @queue_disabled = false
+    @queue_enabled = true
   end
 
   def initialize(badge, user, opts = {})
@@ -124,7 +124,7 @@ class BadgeGranter
   end
 
   def self.queue_badge_grant(type, opt)
-    return if !SiteSetting.enable_badges || @queue_disabled
+    return if !SiteSetting.enable_badges || !@queue_enabled
     payload = nil
 
     case type
diff --git a/app/views/email/default_template.html b/app/views/email/default_template.html
index 99b2e94995c..382f939273b 100644
--- a/app/views/email/default_template.html
+++ b/app/views/email/default_template.html
@@ -3,8 +3,6 @@
 
 <head>
   <meta http-equiv="Content-type" name="viewport" content="initial-scale=1.0, maximum-scale=1.0, user-scalable=no, width=device-width">
-  <!-- prevent ios zooming + autoscaling -->
-  <meta name="x-apple-disable-message-reformatting" />
   <title></title>
 </head>
 
diff --git a/app/views/layouts/email_template.html.erb b/app/views/layouts/email_template.html.erb
index 611eba0df49..80da92efc20 100644
--- a/app/views/layouts/email_template.html.erb
+++ b/app/views/layouts/email_template.html.erb
@@ -2,8 +2,5 @@
   <%= yield %>
   <% if defined?(html_body) %><%= html_body %><% end %>
 <% else %>
-  <%= email_html_template do %>
-    <%= yield %>
-    <% if defined?(html_body) %><%= html_body %><% end %>
-  <% end %>
+  <%= email_html_template(binding).html_safe %>
 <% end %>
diff --git a/app/views/layouts/publish.html.erb b/app/views/layouts/publish.html.erb
index 4a249e8f32d..5bb0f957c58 100644
--- a/app/views/layouts/publish.html.erb
+++ b/app/views/layouts/publish.html.erb
@@ -2,8 +2,13 @@
 <html>
   <head>
     <meta charset="utf-8">
-    <%= render partial: "layouts/head" %>
+    <meta name="viewport" content="width=device-width, initial-scale=1.0, minimum-scale=1.0, user-scalable=yes, viewport-fit=cover">
+
     <%= render partial: "common/discourse_publish_stylesheet" %>
+
+    <%- if @canonical_url -%>
+      <link rel="canonical" href="<%= @canonical_url %>" />
+    <%- end -%>
   </head>
   <body class="<%= @body_classes.to_a.join(' ') %>">
     <%= yield %>
diff --git a/app/views/list/list.erb b/app/views/list/list.erb
index 2338d39c6a5..2d32efb77bf 100644
--- a/app/views/list/list.erb
+++ b/app/views/list/list.erb
@@ -47,8 +47,8 @@
       <tr>
         <th><%= t 'js.topic.title' %></th>
         <th></th>
-        <th class="replies"><%= t 'js.replies' %></th>
-        <th class="views"><%= t 'js.views' %></th>
+        <th><%= t 'js.replies' %></th>
+        <th><%= t 'js.views' %></th>
         <th><%= t 'js.activity' %></th>
       </tr>
     </thead>
@@ -101,10 +101,10 @@
               <% end %>
             <% end %>
           </td>
-          <td class="replies">
+          <td>
             <span class='posts' title='<%= t 'posts' %>'><%= t.posts_count %></span>
           </td>
-          <td class="views">
+          <td>
             <span class='views' title='<%= t 'views' %>'><%= t.views %></span>
           </td>
           <td>
diff --git a/config/application.rb b/config/application.rb
index 0157dc82895..43a8bf3091d 100644
--- a/config/application.rb
+++ b/config/application.rb
@@ -27,10 +27,6 @@ require_relative '../lib/discourse_plugin_registry'
 
 require_relative '../lib/plugin_gem'
 
-if ENV['RAILS_FAILOVER']
-  require 'rails_failover'
-end
-
 # Global config
 require_relative '../app/models/global_setting'
 GlobalSetting.configure!
@@ -254,7 +250,7 @@ module Discourse
     # Our templates shouldn't start with 'discourse/app/templates'
     config.handlebars.templates_root = {
       'discourse/app/templates' => '',
-      'select-kit/addon/templates' => 'select-kit/templates/'
+      'select-kit/app/templates' => 'select-kit/templates/'
     }
 
     config.handlebars.raw_template_namespace = "__DISCOURSE_RAW_TEMPLATES"
diff --git a/config/initializers/001-redis.rb b/config/initializers/001-redis.rb
index f28c59a3b1d..e48441594e9 100644
--- a/config/initializers/001-redis.rb
+++ b/config/initializers/001-redis.rb
@@ -2,20 +2,5 @@
 
 if Rails.env.development? && ENV['DISCOURSE_FLUSH_REDIS']
   puts "Flushing redis (development mode)"
-  Discourse.redis.flushdb
-end
-
-if ENV['RAILS_FAILOVER']
-  message_bus_keepalive_interval = MessageBus.keepalive_interval
-
-  RailsFailover::Redis.register_master_up_callback do
-    MessageBus.keepalive_interval = message_bus_keepalive_interval
-    Discourse.clear_readonly!
-    Discourse.request_refresh!
-  end
-
-  RailsFailover::Redis.register_master_down_callback do
-    # Disables MessageBus keepalive when Redis is in readonly mode
-    MessageBus.keepalive_interval = 0
-  end
+  Discourse.redis.flushall
 end
diff --git a/config/locales/client.en.yml b/config/locales/client.en.yml
index 3c3618ef96e..9746f37f376 100644
--- a/config/locales/client.en.yml
+++ b/config/locales/client.en.yml
@@ -963,7 +963,6 @@ en:
       api_approved: "Approved:"
       api_last_used_at: "Last used at:"
       theme: "Theme"
-      save_to_change_theme: 'Theme will be updated after you click "%{save_text}"'
       home: "Default Home Page"
       staged: "Staged"
 
@@ -2101,7 +2100,7 @@ en:
         help: "Move message back to Inbox"
       edit_message:
         help: "Edit first post of the message"
-        title: "Edit"
+        title: "Edit Message"
       defer:
         help: "Mark as unread"
         title: "Defer"
@@ -3599,6 +3598,12 @@ en:
         tag_event:
           name: "Tag Event"
           details: "When a tag is created, updated or destroyed."
+        flag_event:
+          name: "Flag Event"
+          details: "When a flag is created, agreed, disagreed or ignored."
+        queued_post_event:
+          name: "Post Approval Event"
+          details: "When a new queued post is created, approved or rejected."
         reviewable_event:
           name: "Reviewable Event"
           details: "When a new item is ready for review and when its status is updated."
diff --git a/config/locales/server.en.yml b/config/locales/server.en.yml
index 2341f05c729..06f02313eb9 100644
--- a/config/locales/server.en.yml
+++ b/config/locales/server.en.yml
@@ -1467,7 +1467,6 @@ en:
     exclude_rel_nofollow_domains: "A list of domains where nofollow should not be added to links. example.com will automatically allow sub.example.com as well. As a minimum, you should add the domain of this site to help web crawlers find all content. If other parts of your website are at other domains, add those too."
 
     post_excerpt_maxlength: "Maximum length of a post excerpt / summary."
-    topic_excerpt_maxlength: "Maximum length of a topic excerpt / summary, generated from the first post in a topic."
     show_pinned_excerpt_mobile: "Show excerpt on pinned topics in mobile view."
     show_pinned_excerpt_desktop: "Show excerpt on pinned topics in desktop view."
     post_onebox_maxlength: "Maximum length of a oneboxed Discourse post in characters."
diff --git a/config/routes.rb b/config/routes.rb
index 69ade71938a..d3a1082d435 100644
--- a/config/routes.rb
+++ b/config/routes.rb
@@ -23,7 +23,6 @@ Discourse::Application.routes.draw do
   post "webhooks/sparkpost" => "webhooks#sparkpost"
 
   scope path: nil, constraints: { format: /.*/ } do
-    Sidekiq::Web.set :sessions, Rails.application.config.session_options
     if Rails.env.development?
       mount Sidekiq::Web => "/sidekiq"
       mount Logster::Web => "/logs"
@@ -121,6 +120,7 @@ Discourse::Application.routes.draw do
       put "unsuspend"
       put "revoke_admin", constraints: AdminConstraint.new
       put "grant_admin", constraints: AdminConstraint.new
+      post "generate_api_key", constraints: AdminConstraint.new
       put "revoke_moderation", constraints: AdminConstraint.new
       put "grant_moderation", constraints: AdminConstraint.new
       put "approve"
@@ -950,6 +950,8 @@ Discourse::Application.routes.draw do
   get "/safe-mode" => "safe_mode#index"
   post "/safe-mode" => "safe_mode#enter", as: "safe_mode_enter"
 
+  get "/themes/assets/:ids" => "themes#assets"
+
   unless Rails.env.production?
     get "/qunit" => "qunit#index"
     get "/wizard/qunit" => "wizard#qunit"
diff --git a/config/site_settings.yml b/config/site_settings.yml
index 6209cc621aa..d49bb0e4cfa 100644
--- a/config/site_settings.yml
+++ b/config/site_settings.yml
@@ -394,7 +394,7 @@ login:
     default: false
   github_client_id:
     default: ""
-    regex: "^[a-zA-Z0-9\\.]+$"
+    regex: "^[a-f0-9]+$"
   github_client_secret:
     default: ""
     regex: "^[a-f0-9]+$"
@@ -819,12 +819,6 @@ posting:
       ja: 120
       zh_CN: 120
       zh_TW: 120
-  topic_excerpt_maxlength:
-    default: 220
-    locale_default:
-      ja: 120
-      zh_CN: 120
-      zh_TW: 120
   show_pinned_excerpt_mobile:
     client: true
     default: true
@@ -1388,8 +1382,7 @@ security:
       - Lax
       - Strict
       - Disabled
-      - None
-    regex: "^(Lax|Strict|Disabled|None)$"
+    regex: "^(Lax|Strict|Disabled)$"
   enable_escaped_fragments: true
   allow_index_in_robots_txt: true
   moderators_create_categories: false
diff --git a/db/fixtures/007_web_hook_event_types.rb b/db/fixtures/007_web_hook_event_types.rb
index ec666ec5ad2..8bf8e938055 100644
--- a/db/fixtures/007_web_hook_event_types.rb
+++ b/db/fixtures/007_web_hook_event_types.rb
@@ -30,6 +30,16 @@ WebHookEventType.seed do |b|
   b.name = "tag"
 end
 
+WebHookEventType.seed do |b|
+  b.id = WebHookEventType::FLAG
+  b.name = "flag"
+end
+
+WebHookEventType.seed do |b|
+  b.id = WebHookEventType::QUEUED_POST
+  b.name = "queued_post"
+end
+
 WebHookEventType.seed do |b|
   b.id = WebHookEventType::REVIEWABLE
   b.name = "reviewable"
diff --git a/db/migrate/20200409033412_create_bookmarks_from_post_action_bookmarks.rb b/db/migrate/20200409033412_create_bookmarks_from_post_action_bookmarks.rb
index 57b1885e350..092a0e7b992 100644
--- a/db/migrate/20200409033412_create_bookmarks_from_post_action_bookmarks.rb
+++ b/db/migrate/20200409033412_create_bookmarks_from_post_action_bookmarks.rb
@@ -16,7 +16,6 @@ class CreateBookmarksFromPostActionBookmarks < ActiveRecord::Migration[6.0]
         INNER JOIN posts ON posts.id = post_actions.post_id
         LEFT JOIN bookmarks ON bookmarks.post_id = post_actions.post_id AND bookmarks.user_id = post_actions.user_id
         INNER JOIN topics ON topics.id = posts.topic_id
-        INNER JOIN users ON users.id = post_actions.user_id
         WHERE bookmarks.id IS NULL AND post_action_type_id = :type_id AND post_actions.deleted_at IS NULL AND posts.deleted_at IS NULL
         LIMIT 2000
         SQL
diff --git a/db/migrate/20200514075356_remove_flag_web_hooks.rb b/db/migrate/20200514075356_remove_flag_web_hooks.rb
deleted file mode 100644
index 448b7fb771b..00000000000
--- a/db/migrate/20200514075356_remove_flag_web_hooks.rb
+++ /dev/null
@@ -1,21 +0,0 @@
-# frozen_string_literal: true
-
-class RemoveFlagWebHooks < ActiveRecord::Migration[6.0]
-  def up
-    flag_event_type_id = 7
-
-    DB.exec <<~SQL
-    DELETE FROM web_hook_event_types_hooks
-    WHERE web_hook_event_type_id = #{flag_event_type_id}
-    SQL
-
-    DB.exec <<~SQL
-    DELETE FROM web_hook_event_types
-    WHERE id = #{flag_event_type_id}
-    SQL
-  end
-
-  def down
-    raise ActiveRecord::IrreversibleMigration
-  end
-end
diff --git a/db/migrate/20200514075407_remove_queued_post_web_hooks.rb b/db/migrate/20200514075407_remove_queued_post_web_hooks.rb
deleted file mode 100644
index 632e5013dc9..00000000000
--- a/db/migrate/20200514075407_remove_queued_post_web_hooks.rb
+++ /dev/null
@@ -1,21 +0,0 @@
-# frozen_string_literal: true
-
-class RemoveQueuedPostWebHooks < ActiveRecord::Migration[6.0]
-  def up
-    queued_post_event_type_id = 8
-
-    DB.exec <<~SQL
-    DELETE FROM web_hook_event_types_hooks
-    WHERE web_hook_event_type_id = #{queued_post_event_type_id}
-    SQL
-
-    DB.exec <<~SQL
-    DELETE FROM web_hook_event_types
-    WHERE id = #{queued_post_event_type_id}
-    SQL
-  end
-
-  def down
-    raise ActiveRecord::IrreversibleMigration
-  end
-end
diff --git a/db/post_migrate/20200520001619_remove_fks_from_bookmarks.rb b/db/post_migrate/20200520001619_remove_fks_from_bookmarks.rb
deleted file mode 100644
index 80fee6dab4f..00000000000
--- a/db/post_migrate/20200520001619_remove_fks_from_bookmarks.rb
+++ /dev/null
@@ -1,9 +0,0 @@
-# frozen_string_literal: true
-
-class RemoveFksFromBookmarks < ActiveRecord::Migration[6.0]
-  def change
-    remove_foreign_key :bookmarks, :topics
-    remove_foreign_key :bookmarks, :posts
-    remove_foreign_key :bookmarks, :users
-  end
-end
diff --git a/db/post_migrate/20200522004855_remove_access_control_post_fk.rb b/db/post_migrate/20200522004855_remove_access_control_post_fk.rb
deleted file mode 100644
index 36c8d0fbb72..00000000000
--- a/db/post_migrate/20200522004855_remove_access_control_post_fk.rb
+++ /dev/null
@@ -1,7 +0,0 @@
-# frozen_string_literal: true
-
-class RemoveAccessControlPostFk < ActiveRecord::Migration[6.0]
-  def change
-    remove_foreign_key :uploads, column: :access_control_post_id
-  end
-end
diff --git a/lib/backup_restore/backup_file_handler.rb b/lib/backup_restore/backup_file_handler.rb
index 7b26356989e..c5e37024880 100644
--- a/lib/backup_restore/backup_file_handler.rb
+++ b/lib/backup_restore/backup_file_handler.rb
@@ -65,10 +65,9 @@ module BackupRestore
       return if !@is_archive
 
       log "Unzipping archive, this may take a while..."
-      Discourse::Utils.execute_command(
-        'tar', '--extract', '--gzip', '--file', @archive_path, '--directory', @tmp_directory,
-        failure_message: "Failed to decompress archive."
-      )
+      pipeline = Compression::Pipeline.new([Compression::Tar.new, Compression::Gzip.new])
+      unzipped_path = pipeline.decompress(@tmp_directory, @archive_path, available_size)
+      pipeline.strip_directory(unzipped_path, @tmp_directory)
     end
 
     def extract_db_dump
diff --git a/lib/discourse_plugin_registry.rb b/lib/discourse_plugin_registry.rb
index ab382a4d15c..ae260e2ce1a 100644
--- a/lib/discourse_plugin_registry.rb
+++ b/lib/discourse_plugin_registry.rb
@@ -75,8 +75,6 @@ class DiscoursePluginRegistry
 
   define_filtered_register :editable_group_custom_fields
 
-  define_filtered_register :topic_thumbnail_sizes
-
   def self.register_auth_provider(auth_provider)
     self.auth_providers << auth_provider
   end
diff --git a/lib/discourse_redis.rb b/lib/discourse_redis.rb
index 6b630b7b34d..ff946cacfb5 100644
--- a/lib/discourse_redis.rb
+++ b/lib/discourse_redis.rb
@@ -266,6 +266,12 @@ class DiscourseRedis
     end
   end
 
+  def flushdb
+    DiscourseRedis.ignore_readonly do
+      keys.each { |k| del(k) }
+    end
+  end
+
   def reconnect
     @redis._client.reconnect
   end
diff --git a/lib/file_store/s3_store.rb b/lib/file_store/s3_store.rb
index f42fa73057b..6a26ebd7ee6 100644
--- a/lib/file_store/s3_store.rb
+++ b/lib/file_store/s3_store.rb
@@ -79,35 +79,12 @@ module FileStore
     def has_been_uploaded?(url)
       return false if url.blank?
 
-      begin
-        parsed_url = URI.parse(URI.encode(url))
-      rescue URI::InvalidURIError
-        return false
-      end
-
       base_hostname = URI.parse(absolute_base_url).hostname
-      if url[base_hostname]
-        # if the hostnames match it means the upload is in the same
-        # bucket on s3. however, the bucket folder path may differ in
-        # some cases, and we do not want to assume the url is uploaded
-        # here. e.g. the path of the current site could be /prod and the
-        # other site could be /staging
-        if s3_bucket_folder_path.present?
-          return parsed_url.path.starts_with?("/#{s3_bucket_folder_path}")
-        else
-          return true
-        end
-        return false
-      end
+      return true if url[base_hostname]
 
       return false if SiteSetting.Upload.s3_cdn_url.blank?
       cdn_hostname = URI.parse(SiteSetting.Upload.s3_cdn_url || "").hostname
-      return true if cdn_hostname.presence && url[cdn_hostname]
-      false
-    end
-
-    def s3_bucket_folder_path
-      @s3_helper.s3_bucket_folder_path
+      cdn_hostname.presence && url[cdn_hostname]
     end
 
     def s3_bucket_name
diff --git a/lib/freedom_patches/translate_accelerator.rb b/lib/freedom_patches/translate_accelerator.rb
index 5a82623f8f7..ee724d56d12 100644
--- a/lib/freedom_patches/translate_accelerator.rb
+++ b/lib/freedom_patches/translate_accelerator.rb
@@ -164,7 +164,7 @@ module I18n
 
       by_site[locale].with_indifferent_access
     rescue ActiveRecord::StatementInvalid => e
-      if PG::UndefinedTable === e.cause || PG::UndefinedColumn === e.cause
+      if PG::UndefinedTable === e.cause
         {}
       else
         raise
diff --git a/lib/guardian.rb b/lib/guardian.rb
index 456461fead6..00d496e46eb 100644
--- a/lib/guardian.rb
+++ b/lib/guardian.rb
@@ -493,10 +493,6 @@ class Guardian
     is_staff?
   end
 
-  def can_see_about_stats?
-    true
-  end
-
   def auth_token
     if cookie = request&.cookies[Auth::DefaultCurrentUserProvider::TOKEN_COOKIE]
       UserAuthToken.hash_token(cookie)
diff --git a/lib/plugin/instance.rb b/lib/plugin/instance.rb
index ab48f7cbead..a993ce52f0b 100644
--- a/lib/plugin/instance.rb
+++ b/lib/plugin/instance.rb
@@ -165,16 +165,6 @@ class Plugin::Instance
     DiscoursePluginRegistry.register_editable_group_custom_field(field, self)
   end
 
-  # Request a new size for topic thumbnails
-  # Will respect plugin enabled setting is enabled
-  # Size should be an array with two elements [max_width, max_height]
-  def register_topic_thumbnail_size(size)
-    if !(size.kind_of?(Array) && size.length == 2)
-      raise ArgumentError.new("Topic thumbnail dimension is not valid")
-    end
-    DiscoursePluginRegistry.register_topic_thumbnail_size(size, self)
-  end
-
   def custom_avatar_column(column)
     reloadable_patch do |plugin|
       AvatarLookup.lookup_columns << column
diff --git a/lib/plugin_initialization_guard.rb b/lib/plugin_initialization_guard.rb
index 42c1bda864f..a5a164e9e2e 100644
--- a/lib/plugin_initialization_guard.rb
+++ b/lib/plugin_initialization_guard.rb
@@ -6,44 +6,33 @@ def plugin_initialization_guard(&block)
   rescue => error
     plugins_directory = Rails.root + 'plugins'
 
-    if error.backtrace && error.backtrace_locations
-      plugin_path = error.backtrace_locations.lazy.map do |location|
-        Pathname.new(location.absolute_path)
-          .ascend
-          .lazy
-          .find { |path| path.parent == plugins_directory }
-      end.next
+    plugin_path = error.backtrace_locations.lazy.map do |location|
+      Pathname.new(location.absolute_path)
+        .ascend
+        .lazy
+        .find { |path| path.parent == plugins_directory }
+    end.next
 
-      raise unless plugin_path
+    raise unless plugin_path
 
-      stack_trace = error.backtrace.each_with_index.inject([]) do |messages, (line, index)|
-        if index == 0
-          messages << "#{line}: #{error} (#{error.class})"
-        else
-          messages << "\t#{index}: from #{line}"
-        end
-      end.reverse.join("\n")
+    stack_trace = error.backtrace.each_with_index.inject([]) do |messages, (line, index)|
+      if index == 0
+        messages << "#{line}: #{error} (#{error.class})"
+      else
+        messages << "\t#{index}: from #{line}"
+      end
+    end.reverse.join("\n")
 
-      STDERR.puts <<~MESSAGE
-        #{stack_trace}
+    STDERR.puts <<~MESSAGE
+      #{stack_trace}
 
-        ** INCOMPATIBLE PLUGIN **
+      ** INCOMPATIBLE PLUGIN **
 
-        You are unable to build Discourse due to errors in the plugin at
-        #{plugin_path}
+      You are unable to build Discourse due to errors in the plugin at
+      #{plugin_path}
 
-        Please try removing this plugin and rebuilding again!
-      MESSAGE
-    else
-      STDERR.puts <<~MESSAGE
-        ** PLUGIN FAILURE **
-
-        You are unable to build Discourse due to this error during plugin
-        initialization:
-
-        #{error}
-      MESSAGE
-    end
+      Please try removing this plugin and rebuilding again!
+    MESSAGE
     exit 1
   end
 end
diff --git a/lib/post_creator.rb b/lib/post_creator.rb
index c3b9556df21..8a37e4c9c64 100644
--- a/lib/post_creator.rb
+++ b/lib/post_creator.rb
@@ -374,10 +374,6 @@ class PostCreator
   # discourse post.
   def create_embedded_topic
     return unless @opts[:embed_url].present?
-
-    original_uri = URI.parse(@opts[:embed_url])
-    raise Discourse::InvalidParameters.new(:embed_url) unless original_uri.is_a?(URI::HTTP)
-
     embed = TopicEmbed.new(topic_id: @post.topic_id, post_id: @post.id, embed_url: @opts[:embed_url])
     rollback_from_errors!(embed) unless embed.save
   end
diff --git a/lib/post_revisor.rb b/lib/post_revisor.rb
index d610fccf375..3c9ec277cdb 100644
--- a/lib/post_revisor.rb
+++ b/lib/post_revisor.rb
@@ -567,7 +567,11 @@ class PostRevisor
   end
 
   def update_topic_excerpt
-    @topic.update_excerpt(@post.excerpt_for_topic)
+    excerpt = @post.excerpt_for_topic
+    @topic.update_column(:excerpt, excerpt)
+    if @topic.archetype == "banner"
+      ApplicationController.banner_json_cache.clear
+    end
   end
 
   def update_category_description
diff --git a/lib/tasks/bookmarks.rake b/lib/tasks/bookmarks.rake
index 87fe005b075..d3cf545d2d0 100644
--- a/lib/tasks/bookmarks.rake
+++ b/lib/tasks/bookmarks.rake
@@ -22,7 +22,6 @@ task "bookmarks:sync_to_table" => :environment do |_t, args|
         INNER JOIN posts ON posts.id = post_actions.post_id
         LEFT JOIN bookmarks ON bookmarks.post_id = post_actions.post_id AND bookmarks.user_id = post_actions.user_id
         INNER JOIN topics ON topics.id = posts.topic_id
-        INNER JOIN users ON users.id = post_actions.user_id
         WHERE bookmarks.id IS NULL AND post_action_type_id = :type_id AND post_actions.deleted_at IS NULL AND posts.deleted_at IS NULL
         LIMIT 2000
       SQL
diff --git a/lib/topic_query_params.rb b/lib/topic_query_params.rb
index bab30135a17..e1bb23cb9f7 100644
--- a/lib/topic_query_params.rb
+++ b/lib/topic_query_params.rb
@@ -3,7 +3,7 @@
 module TopicQueryParams
   def build_topic_list_options
     options = {}
-    params[:tags] = [params[:tag_id]] if params[:tag_id].present? && guardian.can_tag_pms?
+    params[:tags] = [params[:tag_id].parameterize] if params[:tag_id].present? && guardian.can_tag_pms?
 
     TopicQuery.public_valid_options.each do |key|
       if params.key?(key)
diff --git a/plugins/discourse-narrative-bot/db/fixtures/001_discobot.rb b/plugins/discourse-narrative-bot/db/fixtures/001_discobot.rb
index fda50b48299..3972a350fbf 100644
--- a/plugins/discourse-narrative-bot/db/fixtures/001_discobot.rb
+++ b/plugins/discourse-narrative-bot/db/fixtures/001_discobot.rb
@@ -4,20 +4,20 @@ discobot_username = 'discobot'
 
 def seed_primary_email
   UserEmail.seed do |ue|
-    ue.id = DiscourseNarrativeBot::BOT_USER_ID
+    ue.id = -2
     ue.email = "discobot_email"
     ue.primary = true
-    ue.user_id = DiscourseNarrativeBot::BOT_USER_ID
+    ue.user_id = -2
   end
 end
 
-unless user = User.find_by(id: DiscourseNarrativeBot::BOT_USER_ID)
+unless user = User.find_by(id: -2)
   suggested_username = UserNameSuggester.suggest(discobot_username)
 
   seed_primary_email
 
   User.seed do |u|
-    u.id = DiscourseNarrativeBot::BOT_USER_ID
+    u.id = -2
     u.name = discobot_username
     u.username = suggested_username
     u.username_lower = suggested_username.downcase
@@ -26,9 +26,22 @@ unless user = User.find_by(id: DiscourseNarrativeBot::BOT_USER_ID)
     u.approved = true
     u.trust_level = TrustLevel[4]
   end
+
+  # TODO Pull the user avatar from that thread for now. In the future, pull it from a local file or from some central discobot repo.
+  if !Rails.env.test?
+    begin
+      UserAvatar.import_url_for_user(
+        "https://cdn.discourse.org/dev/uploads/default/original/2X/e/edb63d57a720838a7ce6a68f02ba4618787f2299.png",
+        User.find(-2),
+        override_gravatar: true
+      )
+    rescue
+      # In case the avatar can't be downloaded, don't fail seed
+    end
+  end
 end
 
-bot = User.find(DiscourseNarrativeBot::BOT_USER_ID)
+bot = User.find(-2)
 
 # ensure discobot has a primary email
 unless bot.primary_email
@@ -49,4 +62,4 @@ if !bot.user_profile.bio_raw
   )
 end
 
-Group.user_trust_level_change!(DiscourseNarrativeBot::BOT_USER_ID, TrustLevel[4])
+Group.user_trust_level_change!(-2, TrustLevel[4])
diff --git a/plugins/discourse-narrative-bot/db/post_migrate/20200520015508_clear_last_gravatar_download_attempt_on_user_avatars.rb b/plugins/discourse-narrative-bot/db/post_migrate/20200520015508_clear_last_gravatar_download_attempt_on_user_avatars.rb
deleted file mode 100644
index c9029730814..00000000000
--- a/plugins/discourse-narrative-bot/db/post_migrate/20200520015508_clear_last_gravatar_download_attempt_on_user_avatars.rb
+++ /dev/null
@@ -1,15 +0,0 @@
-# frozen_string_literal: true
-
-class ClearLastGravatarDownloadAttemptOnUserAvatars < ActiveRecord::Migration[6.0]
-  def up
-    execute <<~SQL
-      UPDATE user_avatars
-      SET last_gravatar_download_attempt = null
-      WHERE user_id = -2 AND custom_upload_id IS NULL AND gravatar_upload_id IS NULL
-    SQL
-  end
-
-  def down
-    raise ActiveRecord::IrreversibleMigration
-  end
-end
diff --git a/plugins/discourse-narrative-bot/plugin.rb b/plugins/discourse-narrative-bot/plugin.rb
index 61047c0e8b2..a6be5dd056f 100644
--- a/plugins/discourse-narrative-bot/plugin.rb
+++ b/plugins/discourse-narrative-bot/plugin.rb
@@ -55,7 +55,6 @@ after_initialize do
 
   module ::DiscourseNarrativeBot
     PLUGIN_NAME = "discourse-narrative-bot".freeze
-    BOT_USER_ID = -2
 
     class Engine < ::Rails::Engine
       engine_name PLUGIN_NAME
@@ -272,9 +271,4 @@ after_initialize do
       end
     end
   end
-
-  UserAvatar.register_custom_user_gravatar_email_hash(
-    DiscourseNarrativeBot::BOT_USER_ID,
-    "discobot@discourse.org"
-  )
 end
diff --git a/plugins/discourse-narrative-bot/spec/discourse_narrative_bot/track_selector_spec.rb b/plugins/discourse-narrative-bot/spec/discourse_narrative_bot/track_selector_spec.rb
index 6914dff1d2f..4e24b9feaef 100644
--- a/plugins/discourse-narrative-bot/spec/discourse_narrative_bot/track_selector_spec.rb
+++ b/plugins/discourse-narrative-bot/spec/discourse_narrative_bot/track_selector_spec.rb
@@ -472,7 +472,7 @@ describe DiscourseNarrativeBot::TrackSelector do
           let(:post) { Fabricate(:post, topic: topic) }
 
           after do
-            Discourse.redis.flushdb
+            Discourse.redis.flushall
           end
 
           describe 'when random reply massage has been displayed in the last 6 hours' do
diff --git a/plugins/discourse-narrative-bot/spec/jobs/send_advanced_tutorial_message_spec.rb b/plugins/discourse-narrative-bot/spec/jobs/send_advanced_tutorial_message_spec.rb
index 874e40cfe81..5d3674cae08 100644
--- a/plugins/discourse-narrative-bot/spec/jobs/send_advanced_tutorial_message_spec.rb
+++ b/plugins/discourse-narrative-bot/spec/jobs/send_advanced_tutorial_message_spec.rb
@@ -1,7 +1,5 @@
 # frozen_string_literal: true
 
-require 'rails_helper'
-
 RSpec.describe Jobs::SendAdvancedTutorialMessage do
   before do
     Jobs.run_immediately!
diff --git a/spec/components/auth/default_current_user_provider_spec.rb b/spec/components/auth/default_current_user_provider_spec.rb
index 8c14233a5ba..1b698cbf368 100644
--- a/spec/components/auth/default_current_user_provider_spec.rb
+++ b/spec/components/auth/default_current_user_provider_spec.rb
@@ -237,7 +237,7 @@ describe Auth::DefaultCurrentUserProvider do
     end
 
     after do
-      Discourse.redis.flushdb
+      Discourse.redis.flushall
     end
 
     it "should not update last seen for suspended users" do
diff --git a/spec/components/discourse_redis_spec.rb b/spec/components/discourse_redis_spec.rb
index abc9a5917a8..6d4af1d8174 100644
--- a/spec/components/discourse_redis_spec.rb
+++ b/spec/components/discourse_redis_spec.rb
@@ -21,11 +21,11 @@ describe DiscourseRedis do
     let(:raw_redis) { Redis.new(DiscourseRedis.config) }
 
     before do
-      raw_redis.flushdb
+      raw_redis.flushall
     end
 
     after do
-      raw_redis.flushdb
+      raw_redis.flushall
     end
 
     describe 'when namespace is enabled' do
diff --git a/spec/components/email/processor_spec.rb b/spec/components/email/processor_spec.rb
index 606955551a1..3fe4ab41b7a 100644
--- a/spec/components/email/processor_spec.rb
+++ b/spec/components/email/processor_spec.rb
@@ -5,7 +5,7 @@ require "email/processor"
 
 describe Email::Processor do
   after do
-    Discourse.redis.flushdb
+    Discourse.redis.flushall
   end
 
   let(:from) { "foo@bar.com" }
diff --git a/spec/components/file_store/s3_store_spec.rb b/spec/components/file_store/s3_store_spec.rb
index 15c36b05be6..99f57c71047 100644
--- a/spec/components/file_store/s3_store_spec.rb
+++ b/spec/components/file_store/s3_store_spec.rb
@@ -251,7 +251,7 @@ describe FileStore::S3Store do
 
       before do
         optimized_image.update!(
-          url: "//s3-upload-bucket.s3.dualstack.us-west-1.amazonaws.com/#{image_path}"
+          url: "//s3-upload-bucket.s3.dualstack.us-west-1.amazonaws.com#{image_path}"
         )
       end
 
@@ -272,12 +272,6 @@ describe FileStore::S3Store do
           SiteSetting.s3_upload_bucket = "s3-upload-bucket/discourse-uploads"
         end
 
-        before do
-          optimized_image.update!(
-            url: "//s3-upload-bucket.s3.dualstack.us-west-1.amazonaws.com/discourse-uploads/#{image_path}"
-          )
-        end
-
         it "removes the file from s3 with the right paths" do
           s3_helper.expects(:s3_bucket).returns(s3_bucket).at_least_once
           s3_object = stub
@@ -304,15 +298,6 @@ describe FileStore::S3Store do
 
   describe ".has_been_uploaded?" do
 
-    it "doesn't crash for invalid URLs" do
-      expect(store.has_been_uploaded?("https://site.discourse.com/#bad#6")).to eq(false)
-    end
-
-    it "doesn't crash if URL contains non-ascii characters" do
-      expect(store.has_been_uploaded?("//s3-upload-bucket.s3.dualstack.us-east-1.amazonaws.com/漢1337.png")).to eq(true)
-      expect(store.has_been_uploaded?("//s3-upload-bucket.s3.amazonaws.com/漢1337.png")).to eq(false)
-    end
-
     it "identifies S3 uploads" do
       expect(store.has_been_uploaded?("//s3-upload-bucket.s3.dualstack.us-east-1.amazonaws.com/1337.png")).to eq(true)
     end
diff --git a/spec/components/guardian/user_guardian_spec.rb b/spec/components/guardian/user_guardian_spec.rb
index 10b6afc9413..b812fa9526d 100644
--- a/spec/components/guardian/user_guardian_spec.rb
+++ b/spec/components/guardian/user_guardian_spec.rb
@@ -25,13 +25,13 @@ describe UserGuardian do
   end
 
   let :already_uploaded do
-    u = Upload.new(user_id: 9999, id: 2)
+    u = Upload.new(user_id: 999, id: 2)
     user_avatar.custom_upload_id = u.id
     u
   end
 
   let :not_my_upload do
-    Upload.new(user_id: 9999, id: 3)
+    Upload.new(user_id: 999, id: 3)
   end
 
   let(:moderator_upload) do
diff --git a/spec/components/pretty_text_spec.rb b/spec/components/pretty_text_spec.rb
index c5ef73c4d23..8969a526bd5 100644
--- a/spec/components/pretty_text_spec.rb
+++ b/spec/components/pretty_text_spec.rb
@@ -508,7 +508,7 @@ describe PrettyText do
         ['apple', 'banana'].each { |w| Fabricate(:watched_word, word: w, action: WatchedWord.actions[:censor]) }
         expect(PrettyText.cook("# banana")).not_to include('banana')
       ensure
-        Discourse.redis.flushdb
+        Discourse.redis.flushall
       end
     end
   end
@@ -1166,7 +1166,7 @@ HTML
   end
 
   describe "censoring" do
-    after(:all) { Discourse.redis.flushdb }
+    after(:all) { Discourse.redis.flushall }
 
     def expect_cooked_match(raw, expected_cooked)
       expect(PrettyText.cook(raw)).to eq(expected_cooked)
diff --git a/spec/components/search_spec.rb b/spec/components/search_spec.rb
index 599ea3c5aa5..a455d81ec13 100644
--- a/spec/components/search_spec.rb
+++ b/spec/components/search_spec.rb
@@ -444,7 +444,7 @@ describe Search do
       end
 
       let(:expected_blurb) do
-        "...quire content longer than the typical test post raw content. It really is some long content, folks. elephant"
+        "...to satisfy any test conditions that require content longer than the typical test post raw content. elephant"
       end
 
       it 'returns the post' do
diff --git a/spec/fabricators/post_fabricator.rb b/spec/fabricators/post_fabricator.rb
index 77a234d9814..42235cb94fc 100644
--- a/spec/fabricators/post_fabricator.rb
+++ b/spec/fabricators/post_fabricator.rb
@@ -10,7 +10,7 @@ end
 Fabricator(:post_with_long_raw_content, from: :post) do
   raw 'This is a sample post with semi-long raw content. The raw content is also more than
       two hundred characters to satisfy any test conditions that require content longer
-      than the typical test post raw content. It really is some long content, folks.'
+      than the typical test post raw content.'
 end
 
 Fabricator(:post_with_youtube, from: :post) do
diff --git a/spec/fabricators/web_hook_fabricator.rb b/spec/fabricators/web_hook_fabricator.rb
index 9edc591791f..46472510808 100644
--- a/spec/fabricators/web_hook_fabricator.rb
+++ b/spec/fabricators/web_hook_fabricator.rb
@@ -71,6 +71,22 @@ Fabricator(:tag_web_hook, from: :web_hook) do
   end
 end
 
+Fabricator(:flag_web_hook, from: :web_hook) do
+  transient flag_hook: WebHookEventType.find_by(name: 'flag')
+
+  after_build do |web_hook, transients|
+    web_hook.web_hook_event_types = [transients[:flag_hook]]
+  end
+end
+
+Fabricator(:queued_post_web_hook, from: :web_hook) do
+  transient queued_post_hook: WebHookEventType.find_by(name: 'queued_post')
+
+  after_build do |web_hook, transients|
+    web_hook.web_hook_event_types = [transients[:queued_post_hook]]
+  end
+end
+
 Fabricator(:reviewable_web_hook, from: :web_hook) do
   transient reviewable_hook: WebHookEventType.find_by(name: 'reviewable')
 
diff --git a/spec/integration/email_style_spec.rb b/spec/integration/email_style_spec.rb
index 395dd19df15..ef69850891d 100644
--- a/spec/integration/email_style_spec.rb
+++ b/spec/integration/email_style_spec.rb
@@ -3,139 +3,128 @@
 require "rails_helper"
 
 describe EmailStyle do
+  before do
+    SiteSetting.email_custom_template = "<body><h1>FOR YOU</h1><div>%{email_content}</div></body>"
+    SiteSetting.email_custom_css = 'h1 { color: red; } div.body { color: #FAB; }'
+    SiteSetting.email_custom_css_compiled = SiteSetting.email_custom_css
+  end
 
-  context "ERB evaluation" do
-    it "does not evaluate ERB outside of the email itself" do
-      SiteSetting.email_custom_template = "<div>%{email_content}</div><%= (111 * 333) %>"
-      html = Email::Renderer.new(UserNotifications.signup(Fabricate(:user))).html
-      expect(html).not_to match("36963")
+  after do
+    SiteSetting.remove_override!(:email_custom_template)
+    SiteSetting.remove_override!(:email_custom_css)
+  end
+
+  context 'invite' do
+    fab!(:invite) { Fabricate(:invite) }
+    let(:invite_mail) { InviteMailer.send_invite(invite) }
+
+    subject(:mail_html) { Email::Renderer.new(invite_mail).html }
+
+    it 'applies customizations' do
+      expect(mail_html.scan('<h1 style="color: red;">FOR YOU</h1>').count).to eq(1)
+      expect(mail_html).to match("#{Discourse.base_url}/invites/#{invite.invite_key}")
+    end
+
+    it 'applies customizations if compiled is missing' do
+      SiteSetting.remove_override!(:email_custom_css_compiled)
+      expect(mail_html.scan('<h1 style="color: red;">FOR YOU</h1>').count).to eq(1)
+      expect(mail_html).to match("#{Discourse.base_url}/invites/#{invite.invite_key}")
+    end
+
+    it 'can apply RTL attrs' do
+      SiteSetting.default_locale = 'he'
+      body_attrs = mail_html.match(/<body ([^>])+/)
+      expect(body_attrs[0]&.downcase).to match(/text-align:\s*right/)
+      expect(body_attrs[0]&.downcase).to include('dir="rtl"')
     end
   end
 
-  context "with a custom template" do
-    before do
-      SiteSetting.email_custom_template = "<body><h1>FOR YOU</h1><div>%{email_content}</div></body>"
-      SiteSetting.email_custom_css = 'h1 { color: red; } div.body { color: #FAB; }'
-      SiteSetting.email_custom_css_compiled = SiteSetting.email_custom_css
+  context 'user_replied' do
+    let(:response_by_user) { Fabricate(:user, name: "John Doe") }
+    let(:category) { Fabricate(:category, name: 'India') }
+    let(:topic) { Fabricate(:topic, category: category, title: "Super cool topic") }
+    let(:post) { Fabricate(:post, topic: topic, raw: 'This is My super duper cool topic') }
+    let(:response) { Fabricate(:basic_reply, topic: post.topic, user: response_by_user) }
+    let(:user) { Fabricate(:user) }
+    let(:notification) { Fabricate(:replied_notification, user: user, post: response) }
+
+    let(:mail) do
+      UserNotifications.user_replied(
+        user,
+        post: response,
+        notification_type: notification.notification_type,
+        notification_data_hash: notification.data_hash
+      )
     end
 
-    after do
-      SiteSetting.remove_override!(:email_custom_template)
-      SiteSetting.remove_override!(:email_custom_css)
+    subject(:mail_html) { Email::Renderer.new(mail).html }
+
+    it "customizations are applied to html part of emails" do
+      expect(mail_html.scan('<h1 style="color: red;">FOR YOU</h1>').count).to eq(1)
+      matches = mail_html.match(/<div style="([^"]+)">#{post.raw}/)
+      expect(matches[1]).to include('color: #FAB;') # custom
+      expect(matches[1]).to include('padding-top:5px;') # div.body
     end
 
-    context 'invite' do
-      fab!(:invite) { Fabricate(:invite) }
-      let(:invite_mail) { InviteMailer.send_invite(invite) }
+    # TODO: translation override
+  end
 
-      subject(:mail_html) { Email::Renderer.new(invite_mail).html }
+  context 'signup' do
+    let(:signup_mail) { UserNotifications.signup(Fabricate(:user)) }
+    subject(:mail_html) { Email::Renderer.new(signup_mail).html }
 
-      it 'applies customizations' do
-        expect(mail_html.scan('<h1 style="color: red;">FOR YOU</h1>').count).to eq(1)
-        expect(mail_html).to match("#{Discourse.base_url}/invites/#{invite.invite_key}")
-      end
-
-      it 'applies customizations if compiled is missing' do
-        SiteSetting.remove_override!(:email_custom_css_compiled)
-        expect(mail_html.scan('<h1 style="color: red;">FOR YOU</h1>').count).to eq(1)
-        expect(mail_html).to match("#{Discourse.base_url}/invites/#{invite.invite_key}")
-      end
-
-      it 'can apply RTL attrs' do
-        SiteSetting.default_locale = 'he'
-        body_attrs = mail_html.match(/<body ([^>])+/)
-        expect(body_attrs[0]&.downcase).to match(/text-align:\s*right/)
-        expect(body_attrs[0]&.downcase).to include('dir="rtl"')
-      end
+    it "customizations are applied to html part of emails" do
+      expect(mail_html.scan('<h1 style="color: red;">FOR YOU</h1>').count).to eq(1)
+      expect(mail_html).to include('activate-account')
     end
 
-    context 'user_replied' do
-      let(:response_by_user) { Fabricate(:user, name: "John Doe") }
-      let(:category) { Fabricate(:category, name: 'India') }
-      let(:topic) { Fabricate(:topic, category: category, title: "Super cool topic") }
-      let(:post) { Fabricate(:post, topic: topic, raw: 'This is My super duper cool topic') }
-      let(:response) { Fabricate(:basic_reply, topic: post.topic, user: response_by_user) }
-      let(:user) { Fabricate(:user) }
-      let(:notification) { Fabricate(:replied_notification, user: user, post: response) }
-
-      let(:mail) do
-        UserNotifications.user_replied(
-          user,
-          post: response,
-          notification_type: notification.notification_type,
-          notification_data_hash: notification.data_hash
+    context 'translation override' do
+      before do
+        TranslationOverride.upsert!(
+          'en',
+          'user_notifications.signup.text_body_template',
+          "CLICK THAT LINK: %{base_url}/u/activate-account/%{email_token}"
         )
       end
 
-      subject(:mail_html) { Email::Renderer.new(mail).html }
-
-      it "customizations are applied to html part of emails" do
-        expect(mail_html.scan('<h1 style="color: red;">FOR YOU</h1>').count).to eq(1)
-        matches = mail_html.match(/<div style="([^"]+)">#{post.raw}/)
-        expect(matches[1]).to include('color: #FAB;') # custom
-        expect(matches[1]).to include('padding-top:5px;') # div.body
+      after do
+        TranslationOverride.revert!('en', ['user_notifications.signup.text_body_template'])
       end
 
-      # TODO: translation override
+      it "applies customizations when translation override exists" do
+        expect(mail_html.scan('<h1 style="color: red;">FOR YOU</h1>').count).to eq(1)
+        expect(mail_html.scan('CLICK THAT LINK').count).to eq(1)
+      end
     end
 
-    context 'signup' do
-      let(:signup_mail) { UserNotifications.signup(Fabricate(:user)) }
-      subject(:mail_html) { Email::Renderer.new(signup_mail).html }
+    context 'with some bad css' do
+      before do
+        SiteSetting.email_custom_css = '@import "nope.css"; h1 {{{ size: really big; '
+        SiteSetting.email_custom_css_compiled = SiteSetting.email_custom_css
+      end
 
-      it "customizations are applied to html part of emails" do
-        expect(mail_html.scan('<h1 style="color: red;">FOR YOU</h1>').count).to eq(1)
+      it "can render the html" do
+        expect(mail_html.scan(/<h1\s*(?:style=""){0,1}>FOR YOU<\/h1>/).count).to eq(1)
         expect(mail_html).to include('activate-account')
       end
-
-      context 'translation override' do
-        before do
-          TranslationOverride.upsert!(
-            'en',
-            'user_notifications.signup.text_body_template',
-            "CLICK THAT LINK: %{base_url}/u/activate-account/%{email_token}"
-          )
-        end
-
-        after do
-          TranslationOverride.revert!('en', ['user_notifications.signup.text_body_template'])
-        end
-
-        it "applies customizations when translation override exists" do
-          expect(mail_html.scan('<h1 style="color: red;">FOR YOU</h1>').count).to eq(1)
-          expect(mail_html.scan('CLICK THAT LINK').count).to eq(1)
-        end
-      end
-
-      context 'with some bad css' do
-        before do
-          SiteSetting.email_custom_css = '@import "nope.css"; h1 {{{ size: really big; '
-          SiteSetting.email_custom_css_compiled = SiteSetting.email_custom_css
-        end
-
-        it "can render the html" do
-          expect(mail_html.scan(/<h1\s*(?:style=""){0,1}>FOR YOU<\/h1>/).count).to eq(1)
-          expect(mail_html).to include('activate-account')
-        end
-      end
-    end
-
-    context 'digest' do
-      fab!(:popular_topic) { Fabricate(:topic, user: Fabricate(:coding_horror), created_at: 1.hour.ago) }
-      let(:summary_email) { UserNotifications.digest(Fabricate(:user)) }
-      subject(:mail_html) { Email::Renderer.new(summary_email).html }
-
-      it "customizations are applied to html part of emails" do
-        expect(mail_html.scan('<h1 style="color: red;">FOR YOU</h1>').count).to eq(1)
-        expect(mail_html).to include(popular_topic.title)
-      end
-
-      it "doesn't apply customizations if apply_custom_styles_to_digest is disabled" do
-        SiteSetting.apply_custom_styles_to_digest = false
-        expect(mail_html).to_not include('<h1 style="color: red;">FOR YOU</h1>')
-        expect(mail_html).to_not include('FOR YOU')
-        expect(mail_html).to include(popular_topic.title)
-      end
+    end
+  end
+
+  context 'digest' do
+    fab!(:popular_topic) { Fabricate(:topic, user: Fabricate(:coding_horror), created_at: 1.hour.ago) }
+    let(:summary_email) { UserNotifications.digest(Fabricate(:user)) }
+    subject(:mail_html) { Email::Renderer.new(summary_email).html }
+
+    it "customizations are applied to html part of emails" do
+      expect(mail_html.scan('<h1 style="color: red;">FOR YOU</h1>').count).to eq(1)
+      expect(mail_html).to include(popular_topic.title)
+    end
+
+    it "doesn't apply customizations if apply_custom_styles_to_digest is disabled" do
+      SiteSetting.apply_custom_styles_to_digest = false
+      expect(mail_html).to_not include('<h1 style="color: red;">FOR YOU</h1>')
+      expect(mail_html).to_not include('FOR YOU')
+      expect(mail_html).to include(popular_topic.title)
     end
   end
 end
diff --git a/spec/integration/topic_thumbnail_spec.rb b/spec/integration/topic_thumbnail_spec.rb
index dcdbb084d5a..9ba35cbe970 100644
--- a/spec/integration/topic_thumbnail_spec.rb
+++ b/spec/integration/topic_thumbnail_spec.rb
@@ -10,7 +10,7 @@ describe "Topic Thumbnails" do
 
   context 'latest' do
     def get_topic
-      Discourse.redis.del(topic.thumbnail_job_redis_key(Topic.thumbnail_sizes))
+      Discourse.redis.del(topic.thumbnail_job_redis_key([]))
       get '/latest.json'
       response.parsed_body["topic_list"]["topics"][0]
     end
@@ -84,38 +84,5 @@ describe "Topic Thumbnails" do
         expect(thumbnails.length).to eq(5)
       end
     end
-
-    context "with a plugin" do
-      before do
-        plugin = Plugin::Instance.new
-        plugin.register_topic_thumbnail_size [512, 512]
-      end
-
-      after do
-        DiscoursePluginRegistry.reset!
-      end
-
-      it "includes the theme specified resolutions" do
-        topic_json = nil
-
-        expect do
-          topic_json = get_topic
-        end.to change { Jobs::GenerateTopicThumbnails.jobs.size }.by(1)
-
-        # Run the job
-        args = Jobs::GenerateTopicThumbnails.jobs.last["args"].first
-        Jobs::GenerateTopicThumbnails.new.execute(args.with_indifferent_access)
-
-        # Request again
-        expect do
-          topic_json = get_topic
-        end.to change { Jobs::GenerateTopicThumbnails.jobs.size }.by(0)
-
-        thumbnails = topic_json["thumbnails"]
-
-        # Original + Optimized + 1 plugin request
-        expect(thumbnails.length).to eq(3)
-      end
-    end
   end
 end
diff --git a/spec/jobs/bookmark_reminder_notifications_spec.rb b/spec/jobs/bookmark_reminder_notifications_spec.rb
index 25379d0ba39..0bcfa0b3d21 100644
--- a/spec/jobs/bookmark_reminder_notifications_spec.rb
+++ b/spec/jobs/bookmark_reminder_notifications_spec.rb
@@ -22,7 +22,7 @@ RSpec.describe Jobs::BookmarkReminderNotifications do
     bookmark1.update_column(:reminder_at, five_minutes_ago - 10.minutes)
     bookmark2.update_column(:reminder_at, five_minutes_ago - 5.minutes)
     bookmark3.update_column(:reminder_at, five_minutes_ago)
-    Discourse.redis.flushdb
+    Discourse.redis.flushall
   end
 
   it "sends every reminder and marks the reminder_at to nil for all bookmarks, as well as last sent date" do
diff --git a/spec/lib/bookmark_reminder_notification_handler_spec.rb b/spec/lib/bookmark_reminder_notification_handler_spec.rb
index 3d9a6d77f64..6af860f2f04 100644
--- a/spec/lib/bookmark_reminder_notification_handler_spec.rb
+++ b/spec/lib/bookmark_reminder_notification_handler_spec.rb
@@ -8,7 +8,7 @@ RSpec.describe BookmarkReminderNotificationHandler do
   fab!(:user) { Fabricate(:user) }
 
   before do
-    Discourse.redis.flushdb
+    Discourse.redis.flushall
   end
 
   describe "#send_notification" do
diff --git a/spec/models/post_spec.rb b/spec/models/post_spec.rb
index 5bc5206bced..4cc716d6916 100644
--- a/spec/models/post_spec.rb
+++ b/spec/models/post_spec.rb
@@ -1158,25 +1158,6 @@ describe Post do
     expect(post.custom_fields).to eq("Tommy" => "Hanks", "Vincent" => "Vega")
   end
 
-  describe "#excerpt_for_topic" do
-    it "returns a topic excerpt, defaulting to 220 chars" do
-      expected_excerpt = "This is a sample post with semi-long raw content. The raw content is also more than \ntwo hundred characters to satisfy any test conditions that require content longer \nthan the typical test post raw content. It really is&hellip;"
-      post = Fabricate(:post_with_long_raw_content)
-      post.rebake!
-      excerpt = post.excerpt_for_topic
-      expect(excerpt).to eq(expected_excerpt)
-    end
-
-    it "respects the site setting for topic excerpt" do
-      SiteSetting.topic_excerpt_maxlength = 10
-      expected_excerpt = "This is a &hellip;"
-      post = Fabricate(:post_with_long_raw_content)
-      post.rebake!
-      excerpt = post.excerpt_for_topic
-      expect(excerpt).to eq(expected_excerpt)
-    end
-  end
-
   describe "#rebake!" do
     it "will rebake a post correctly" do
       post = create_post
@@ -1195,25 +1176,6 @@ describe Post do
       expect(post.cooked).to eq(first_cooked)
       expect(result).to eq(true)
     end
-
-    it "updates the topic excerpt at the same time if it is the OP" do
-      post = create_post
-      post.topic.update(excerpt: "test")
-      DB.exec("UPDATE posts SET cooked = 'frogs' WHERE id = ?", [ post.id ])
-      post.reload
-      result = post.rebake!
-      post.topic.reload
-      expect(post.topic.excerpt).not_to eq("test")
-    end
-
-    it "does not update the topic excerpt if the post is not the OP" do
-      post = create_post
-      post2 = create_post
-      post.topic.update(excerpt: "test")
-      result = post2.rebake!
-      post.topic.reload
-      expect(post.topic.excerpt).to eq("test")
-    end
   end
 
   describe "#set_owner" do
diff --git a/spec/models/topic_embed_spec.rb b/spec/models/topic_embed_spec.rb
index c91781e6dd7..ddfbe115ecf 100644
--- a/spec/models/topic_embed_spec.rb
+++ b/spec/models/topic_embed_spec.rb
@@ -308,14 +308,6 @@ describe TopicEmbed do
       end
     end
 
-    context "non-http URL" do
-      let(:url) { '/test.txt' }
-
-      it "throws an error" do
-        expect { TopicEmbed.find_remote(url) }.to raise_error(URI::InvalidURIError)
-      end
-    end
-
     context "emails" do
       let(:url) { 'http://example.com/foo' }
       let(:contents) { '<p><a href="mailto:foo%40example.com">URL encoded @ symbol</a></p><p><a href="mailto:bar@example.com">normal mailto link</a></p>' }
diff --git a/spec/models/topic_spec.rb b/spec/models/topic_spec.rb
index d1d5d1cc911..d3815793009 100644
--- a/spec/models/topic_spec.rb
+++ b/spec/models/topic_spec.rb
@@ -33,7 +33,7 @@ describe Topic do
 
       describe 'censored words' do
         after do
-          Discourse.redis.flushdb
+          Discourse.redis.flushall
         end
 
         describe 'when title contains censored words' do
diff --git a/spec/models/user_spec.rb b/spec/models/user_spec.rb
index 4d2592c788f..89d5f627041 100644
--- a/spec/models/user_spec.rb
+++ b/spec/models/user_spec.rb
@@ -1578,15 +1578,20 @@ describe User do
 
     describe '#number_of_rejected_posts' do
       it 'counts rejected posts' do
-        Fabricate(:reviewable_queued_post, created_by: user, status: Reviewable.statuses[:rejected])
+        post = Fabricate(:post, user: user)
+
+        Fabricate(:reviewable_queued_post, target: post, status: Reviewable.statuses[:rejected])
 
         expect(user.number_of_rejected_posts).to eq(1)
       end
 
       it 'ignore non-rejected posts' do
-        Fabricate(:reviewable_queued_post, created_by: user, status: Reviewable.statuses[:approved])
+        post = Fabricate(:post, user: user)
+
+        Fabricate(:reviewable_queued_post, target: post, status: Reviewable.statuses[:approved])
 
         expect(user.number_of_rejected_posts).to eq(0)
+
       end
     end
   end
diff --git a/spec/multisite/s3_store_spec.rb b/spec/multisite/s3_store_spec.rb
index 064c699a12b..922c5f433ba 100644
--- a/spec/multisite/s3_store_spec.rb
+++ b/spec/multisite/s3_store_spec.rb
@@ -217,47 +217,4 @@ RSpec.describe 'Multisite s3 uploads', type: :multisite do
       end
     end
   end
-
-  describe "#has_been_uploaded?" do
-    before do
-      SiteSetting.s3_region = 'us-west-1'
-      SiteSetting.s3_upload_bucket = "s3-upload-bucket/test"
-      SiteSetting.s3_access_key_id = "s3-access-key-id"
-      SiteSetting.s3_secret_access_key = "s3-secret-access-key"
-      SiteSetting.enable_s3_uploads = true
-    end
-
-    let(:store) { FileStore::S3Store.new }
-    let(:client) { Aws::S3::Client.new(stub_responses: true) }
-    let(:resource) { Aws::S3::Resource.new(client: client) }
-    let(:s3_bucket) { resource.bucket(SiteSetting.s3_upload_bucket) }
-    let(:s3_helper) { store.s3_helper }
-
-    it "returns false for blank urls" do
-      url = ""
-      expect(store.has_been_uploaded?(url)).to eq(false)
-    end
-
-    it "returns true if the base hostname is the same for both urls" do
-      url = "https://s3-upload-bucket.s3.dualstack.us-west-1.amazonaws.com/test/original/2X/d/dd7964f5fd13e1103c5244ca30abe1936c0a4b88.png"
-      expect(store.has_been_uploaded?(url)).to eq(true)
-    end
-
-    it "returns false if the base hostname is the same for both urls BUT the bucket name is different in the path" do
-      bucket = "someotherbucket"
-      url = "https://s3-upload-bucket.s3.dualstack.us-west-1.amazonaws.com/#{bucket}/original/2X/d/dd7964f5fd13e1103c5244ca30abe1936c0a4b88.png"
-      expect(store.has_been_uploaded?(url)).to eq(false)
-    end
-
-    it "returns false if the hostnames do not match and the s3_cdn_url is blank" do
-      url = "https://www.someotherhostname.com/test/original/2X/d/dd7964f5fd13e1103c5244ca30abe1936c0a4b88.png"
-      expect(store.has_been_uploaded?(url)).to eq(false)
-    end
-
-    it "returns true if the s3_cdn_url is present and matches the url hostname" do
-      SiteSetting.s3_cdn_url = "https://www.someotherhostname.com"
-      url = "https://www.someotherhostname.com/test/original/2X/d/dd7964f5fd13e1103c5244ca30abe1936c0a4b88.png"
-      expect(store.has_been_uploaded?(url)).to eq(true)
-    end
-  end
 end
diff --git a/spec/rails_helper.rb b/spec/rails_helper.rb
index 256de296583..a0ce4b71b7d 100644
--- a/spec/rails_helper.rb
+++ b/spec/rails_helper.rb
@@ -128,12 +128,6 @@ module TestSetup
     # code that runs inside jobs. run_later! means they are put on the redis
     # queue and never processed.
     Jobs.run_later!
-
-    # Don't track ApplicationRequests in test mode unless opted in
-    ApplicationRequest.disable
-
-    # Don't queue badge grant in test mode
-    BadgeGranter.disable_queue
   end
 end
 
diff --git a/spec/requests/about_controller_spec.rb b/spec/requests/about_controller_spec.rb
index a10b7663043..6c58284979f 100644
--- a/spec/requests/about_controller_spec.rb
+++ b/spec/requests/about_controller_spec.rb
@@ -36,21 +36,5 @@ describe AboutController do
         expect(response.body).to include("<title>About - Discourse</title>")
       end
     end
-
-    it "serializes stats when 'Guardian#can_see_about_stats?' is true" do
-      Guardian.any_instance.stubs(:can_see_about_stats?).returns(true)
-      get "/about.json"
-
-      expect(response.status).to eq(200)
-      expect(response.parsed_body["about"].keys).to include("stats")
-    end
-
-    it "does not serialize stats when 'Guardian#can_see_about_stats?' is false" do
-      Guardian.any_instance.stubs(:can_see_about_stats?).returns(false)
-      get "/about.json"
-
-      expect(response.status).to eq(200)
-      expect(response.parsed_body["about"].keys).not_to include("stats")
-    end
   end
 end
diff --git a/spec/requests/admin/backups_controller_spec.rb b/spec/requests/admin/backups_controller_spec.rb
index 03b9245744d..466d4a938be 100644
--- a/spec/requests/admin/backups_controller_spec.rb
+++ b/spec/requests/admin/backups_controller_spec.rb
@@ -35,7 +35,7 @@ RSpec.describe Admin::BackupsController do
   end
 
   after do
-    Discourse.redis.flushdb
+    Discourse.redis.flushall
 
     @paths&.each { |path| File.delete(path) if File.exists?(path) }
     @paths = nil
diff --git a/spec/requests/admin/users_controller_spec.rb b/spec/requests/admin/users_controller_spec.rb
index 099372cad00..f62407d9569 100644
--- a/spec/requests/admin/users_controller_spec.rb
+++ b/spec/requests/admin/users_controller_spec.rb
@@ -293,7 +293,7 @@ RSpec.describe Admin::UsersController do
     fab!(:another_user) { Fabricate(:coding_horror) }
 
     after do
-      Discourse.redis.flushdb
+      Discourse.redis.flushall
     end
 
     it "raises an error when the user doesn't have permission" do
diff --git a/spec/requests/list_controller_spec.rb b/spec/requests/list_controller_spec.rb
index bc913c58a04..d1238c1f00f 100644
--- a/spec/requests/list_controller_spec.rb
+++ b/spec/requests/list_controller_spec.rb
@@ -128,7 +128,7 @@ RSpec.describe ListController do
     let(:moderator) { Fabricate(:moderator) }
     let(:admin) { Fabricate(:admin) }
     let(:tag) { Fabricate(:tag) }
-    let(:private_message) { Fabricate(:private_message_topic, user: admin) }
+    let(:private_message) { Fabricate(:private_message_topic) }
 
     before do
       SiteSetting.tagging_enabled = true
@@ -149,17 +149,6 @@ RSpec.describe ListController do
         expect(response.status).to eq(200)
       end
     end
-
-    it 'should work for tag with unicode name' do
-      unicode_tag = Fabricate(:tag, name: 'hello-🇺🇸')
-      Fabricate(:topic_tag, tag: unicode_tag, topic: private_message)
-
-      sign_in(admin)
-      get "/topics/private-messages-tags/#{admin.username}/#{UrlHelper.encode_component(unicode_tag.name)}.json"
-      expect(response.status).to eq(200)
-      expect(response.parsed_body["topic_list"]["topics"].first["id"])
-        .to eq(private_message.id)
-    end
   end
 
   describe '#private_messages_group' do
diff --git a/spec/requests/posts_controller_spec.rb b/spec/requests/posts_controller_spec.rb
index ff355ada967..909db8c509b 100644
--- a/spec/requests/posts_controller_spec.rb
+++ b/spec/requests/posts_controller_spec.rb
@@ -675,17 +675,6 @@ describe PostsController do
           I18n.t("invalid_params", message: "category")
         )
       end
-
-      it 'will raise an error if specified embed_url is invalid' do
-        user = Fabricate(:admin)
-        master_key = Fabricate(:api_key).key
-
-        post "/posts.json",
-          params: { title: 'this is a test title', raw: 'this is test body', embed_url: '/test.txt' },
-          headers: { HTTP_API_USERNAME: user.username, HTTP_API_KEY: master_key }
-
-        expect(response.status).to eq(422)
-      end
     end
 
     describe "when logged in" do
diff --git a/spec/requests/search_controller_spec.rb b/spec/requests/search_controller_spec.rb
index dac11690d3e..947bd8754a9 100644
--- a/spec/requests/search_controller_spec.rb
+++ b/spec/requests/search_controller_spec.rb
@@ -26,11 +26,11 @@ describe SearchController do
     before do
       # TODO be a bit more strategic here instead of junking
       # all of redis
-      Discourse.redis.flushdb
+      Discourse.redis.flushall
     end
 
     after do
-      Discourse.redis.flushdb
+      Discourse.redis.flushall
     end
 
     context "when overloaded" do
diff --git a/spec/requests/topics_controller_spec.rb b/spec/requests/topics_controller_spec.rb
index 9649f57f5ba..726b92228f2 100644
--- a/spec/requests/topics_controller_spec.rb
+++ b/spec/requests/topics_controller_spec.rb
@@ -2127,7 +2127,7 @@ RSpec.describe TopicsController do
     let(:topic) { post.topic }
 
     after do
-      Discourse.redis.flushdb
+      Discourse.redis.flushall
     end
 
     it 'returns first post of the topic' do
diff --git a/spec/requests/webhooks_controller_spec.rb b/spec/requests/webhooks_controller_spec.rb
index 580c0c72f05..7772e0eb186 100644
--- a/spec/requests/webhooks_controller_spec.rb
+++ b/spec/requests/webhooks_controller_spec.rb
@@ -3,7 +3,7 @@
 require "rails_helper"
 
 describe WebhooksController do
-  before { Discourse.redis.flushdb }
+  before { Discourse.redis.flushall }
 
   let(:email) { "em@il.com" }
   let(:message_id) { "12345@il.com" }
diff --git a/spec/serializers/topic_view_serializer_spec.rb b/spec/serializers/topic_view_serializer_spec.rb
index f6249b275bb..5da26a674ec 100644
--- a/spec/serializers/topic_view_serializer_spec.rb
+++ b/spec/serializers/topic_view_serializer_spec.rb
@@ -60,7 +60,7 @@ describe TopicViewSerializer do
       it 'should have thumbnails' do
         SiteSetting.create_thumbnails = true
 
-        Discourse.redis.del(topic.thumbnail_job_redis_key(Topic.thumbnail_sizes))
+        Discourse.redis.del(topic.thumbnail_job_redis_key([]))
         json = nil
 
         expect do
diff --git a/spec/services/word_watcher_spec.rb b/spec/services/word_watcher_spec.rb
index 5cf70b65839..0f6a2b7bb39 100644
--- a/spec/services/word_watcher_spec.rb
+++ b/spec/services/word_watcher_spec.rb
@@ -7,7 +7,7 @@ describe WordWatcher do
   let(:raw) { "Do you like liquorice?\n\nI really like them. One could even say that I am *addicted* to liquorice. Anf if\nyou can mix it up with some anise, then I'm in heaven ;)" }
 
   after do
-    Discourse.redis.flushdb
+    Discourse.redis.flushall
   end
 
   describe '.word_matcher_regexp' do
diff --git a/test/javascripts/acceptance/category-chooser-test.js b/test/javascripts/acceptance/category-chooser-test.js
index 2247c8cbee7..b6772ab7710 100644
--- a/test/javascripts/acceptance/category-chooser-test.js
+++ b/test/javascripts/acceptance/category-chooser-test.js
@@ -29,19 +29,3 @@ QUnit.test("prefill category when category_id is set", async assert => {
     1
   );
 });
-
-QUnit.test("filter is case insensitive", async assert => {
-  const categoryChooser = selectKit(".category-chooser");
-
-  await visit("/");
-  await click("#create-topic");
-  await categoryChooser.expand();
-  await categoryChooser.fillInFilter("bug");
-
-  assert.ok(categoryChooser.rows().length, 1);
-
-  await categoryChooser.emptyFilter();
-  await categoryChooser.fillInFilter("Bug");
-
-  assert.ok(categoryChooser.rows().length, 1);
-});
diff --git a/test/javascripts/acceptance/emoji-picker-test.js b/test/javascripts/acceptance/emoji-picker-test.js
index a3d8472b535..6a4922ed5c0 100644
--- a/test/javascripts/acceptance/emoji-picker-test.js
+++ b/test/javascripts/acceptance/emoji-picker-test.js
@@ -168,6 +168,19 @@ QUnit.test(
   }
 );
 
+QUnit.test("emoji picker lazy loads emojis", async assert => {
+  await visit("/t/internationalization-localization/280");
+  await click("#topic-footer-buttons .btn.create");
+
+  await click("button.emoji.btn");
+
+  assert.equal(
+    find('.emoji-picker button[title="massage_woman"]').css("background-image"),
+    "none",
+    "it doesn't load invisible emojis"
+  );
+});
+
 QUnit.test("emoji picker persists state", async assert => {
   await visit("/t/internationalization-localization/280");
   await click("#topic-footer-buttons .btn.create");
diff --git a/test/javascripts/acceptance/preferences-test.js b/test/javascripts/acceptance/preferences-test.js
index 20afdcd1677..a9db1f08e50 100644
--- a/test/javascripts/acceptance/preferences-test.js
+++ b/test/javascripts/acceptance/preferences-test.js
@@ -1,6 +1,7 @@
 import I18n from "I18n";
 import { acceptance, updateCurrentUser } from "helpers/qunit-helpers";
 import selectKit from "helpers/select-kit-helper";
+
 import User from "discourse/models/user";
 
 acceptance("User Preferences", {
diff --git a/test/javascripts/fixtures/about.js b/test/javascripts/fixtures/about.js
index 4c7de6a87a3..7f9f17cbba5 100644
--- a/test/javascripts/fixtures/about.js
+++ b/test/javascripts/fixtures/about.js
@@ -1,7 +1,6 @@
 export default {
   "about.json": {
     about: {
-      can_see_about_stats: true,
       stats: {
         topic_count: 27480,
         post_count: 490358,
diff --git a/test/javascripts/helpers/select-kit-helper.js b/test/javascripts/helpers/select-kit-helper.js
index f7959913263..5d80b8f0b37 100644
--- a/test/javascripts/helpers/select-kit-helper.js
+++ b/test/javascripts/helpers/select-kit-helper.js
@@ -32,11 +32,6 @@ async function selectKitFillInFilter(filter, selector) {
   );
 }
 
-async function selectKitEmptyFilter(selector) {
-  checkSelectKitIsNotCollapsed(selector);
-  await fillIn(`${selector} .filter-input`, "");
-}
-
 async function selectKitSelectRowByValue(value, selector) {
   checkSelectKitIsNotCollapsed(selector);
   await click(`${selector} .select-kit-row[data-value='${value}']`);
@@ -185,10 +180,6 @@ export default function selectKit(selector) {
       await selectKitFillInFilter(filter, selector);
     },
 
-    async emptyFilter() {
-      await selectKitEmptyFilter(selector);
-    },
-
     async keyboard(value, target) {
       await keyboardHelper(value, target, selector);
     },