Rerender actions on like/dislike

app/assets/javascripts/discourse/views/post-menu.js.es6

@@ -48,6 +48,7 @@ export default Discourse.View.extend(StringBuffer, {
 
   rerenderTriggers: [
     'post.deleted_at',
+    'post.like_count',
     'post.reply_count',
     'post.showRepliesBelow',
     'post.can_delete',

app/serializers/post_serializer.rb

@@ -11,6 +11,7 @@ class PostSerializer < BasicPostSerializer
   attributes :post_number,
              :post_type,
              :updated_at,
+             :like_count,
              :reply_count,
              :reply_to_post_number,
              :quote_count,