Don't show the link to "Needs Approval" unless approval is enabled.

Note that any plugin that extends the NewPostMananger to support
enqueuing will enable it.

app/assets/javascripts/discourse/templates/site-map.hbs

@@ -30,7 +30,7 @@
       <li>{{#link-to 'users'}}{{i18n "directory.title"}}{{/link-to}}</li>
     {{/if}}
 
-    {{#if currentUser.staff}}
+    {{#if currentUser.show_queued_posts}}
       <li>
         {{#link-to 'queued-posts'}}
           {{i18n "queue.title"}}

app/serializers/current_user_serializer.rb

@@ -1,3 +1,5 @@
+require_dependency 'new_post_manager'
+
 class CurrentUserSerializer < BasicUserSerializer
 
   attributes :name,
@@ -27,7 +29,8 @@ class CurrentUserSerializer < BasicUserSerializer
              :muted_category_ids,
              :dismissed_banner_key,
              :is_anonymous,
-             :post_queue_new_count
+             :post_queue_new_count,
+             :show_queued_posts
 
   def include_site_flagged_posts_count?
     object.staff?
@@ -116,4 +119,12 @@ class CurrentUserSerializer < BasicUserSerializer
     object.staff?
   end
 
+  def show_queued_posts
+    true
+  end
+
+  def include_show_queued_posts?
+    object.staff? && NewPostManager.queue_enabled?
+  end
+
 end

lib/new_post_manager.rb

@@ -26,6 +26,12 @@ class NewPostManager
     end
   end
 
+  def self.queue_enabled?
+    SiteSetting.approve_post_count > 0 ||
+    SiteSetting.approve_unless_trust_level.to_i > 0 ||
+    handlers.size > 1
+  end
+
   add_handler {|manager| default_handler(manager) }
 
   def initialize(user, args)

spec/components/new_post_manager_spec.rb

@@ -28,6 +28,7 @@ describe NewPostManager do
 
       it "doesn't return a result action" do
         result = NewPostManager.default_handler(manager)
+        expect(NewPostManager.queue_enabled?).to eq(false)
         expect(result).to eq(nil)
       end
     end
@@ -38,6 +39,7 @@ describe NewPostManager do
       end
       it "will return an enqueue result" do
         result = NewPostManager.default_handler(manager)
+        expect(NewPostManager.queue_enabled?).to eq(true)
         expect(result.action).to eq(:enqueued)
       end
     end
@@ -48,6 +50,7 @@ describe NewPostManager do
       end
       it "will return an enqueue result" do
         result = NewPostManager.default_handler(manager)
+        expect(NewPostManager.queue_enabled?).to eq(true)
         expect(result.action).to eq(:enqueued)
       end
     end
@@ -79,6 +82,10 @@ describe NewPostManager do
       NewPostManager.handlers.delete(@queue_handler)
     end
 
+    it "has a queue enabled" do
+      expect(NewPostManager.queue_enabled?).to eq(true)
+    end
+
     it "calls custom handlers" do
       manager = NewPostManager.new(topic.user, raw: 'this post increases counter', topic_id: topic.id)