UX: Render polls within the same run loop.

* Rendering polls in a seperate run loops causes
our topic list page to be jumpy because of changing
heights after polls have been rendered.

plugins/poll/assets/javascripts/initializers/extend-for-poll.js.es6

@@ -101,7 +101,7 @@ function initializePolls(api) {
       );
 
       $poll.replaceWith($div);
-      Em.run.next(() => pollView.renderer.replaceIn(pollView, $div[0]));
+      Em.run.schedule('afterRender', () => pollView.renderer.replaceIn(pollView, $div[0]));
       postPollViews[pollId] = pollView;
     });