Merge pull request #4285 from tgxworld/fix_polls_not_cooked

FIX: Incorrect model for embedded post widget.

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

@@ -108,6 +108,7 @@ function initializePolls(api) {
     _pollViews = postPollViews;
   }
 
+  api.includePostAttributes("polls", "polls_votes");
   api.decorateCooked(createPollViews, { onlyStream: true });
   api.cleanupStream(cleanUpPollViews);
 }