FEATURE: show timeline component when expanding post progress

- Show fullscreen timeline with title of topic in mobile
- Go to post # kb shortcut now unconditionally uses a modal
- Always show wrench on topics (was missing if progress bar was showing)
- Be smarter about rendering timeline even if composer is open (provided there is room)

app/assets/javascripts/discourse/controllers/topic.js.es6

@@ -670,6 +670,8 @@ export default Ember.Controller.extend(SelectedPostsCount, BufferedContent, {
       return;
     }
 
+    this.appEvents.trigger('topic:jump-to-post', postId);
+
     const topic = this.get('model');
     const postStream = topic.get('postStream');
     const post = postStream.findLoadedPost(postId);