FIX: Client not setting TopicTimer#based_on_last_post.

https://meta.discourse.org/t/incorrect-message-key-in-temporarily-closed-topic/87773

app/assets/javascripts/discourse/components/edit-topic-timer-form.js.es6

@@ -46,5 +46,12 @@ export default Ember.Component.extend({
     }
 
     this.set("topicTimer.updateTime", time);
-  }
+  },
+
+  @observes("selection")
+  _updateBasedOnLastPost() {
+    if (!this.get('autoClose')) {
+      this.set('topicTimer.based_on_last_post', false);
+    }
+  },
 });

app/assets/javascripts/discourse/components/topic-timer-info.js.es6

@@ -18,7 +18,6 @@ export default Ember.Component.extend(bufferedRender({
     if (!this.get('executeAt')) return;
 
     let statusUpdateAt = moment(this.get('executeAt'));
-    if (statusUpdateAt < new Date()) return;
 
     let duration = moment.duration(statusUpdateAt - moment());
     let minutesLeft = duration.asMinutes();

app/assets/javascripts/discourse/templates/components/edit-topic-timer-form.hbs

@@ -9,7 +9,7 @@
           input=topicTimer.updateTime
           statusType=selection
           includeWeekend=true
-          basedOnLastPost=false}}
+          basedOnLastPost=topicTimer.based_on_last_post}}
     {{else if publishToCategory}}
       <div class="control-group">
         <label>{{i18n 'topic.topic_status_update.publish_to'}}</label>
@@ -23,7 +23,7 @@
           statusType=selection
           includeWeekend=true
           categoryId=topicTimer.category_id
-          basedOnLastPost=false}}
+          basedOnLastPost=topicTimer.based_on_last_post}}
     {{else if autoClose}}
       {{future-date-input
           input=topicTimer.updateTime

app/assets/javascripts/select-kit/components/future-date-input-selector.js.es6

@@ -155,7 +155,7 @@ export default ComboBoxComponent.extend(DatetimeMixin, {
   },
 
   mutateValue(value) {
-    if (this.get("isCustom") || this.get("isBasedOnLastPost")) {
+    if (value === 'pick_date_and_time' || this.get("isBasedOnLastPost")) {
       this.set("value", value);
     } else {
       let input = null;