Be more specific about where to fill in comments

Fixes CNVS-20858 and CNVS-20711

Test plan:
 - Create a quiz with a matching question
 - Add comments on the matching answers and save
 - Edit matching question and save
 - Edit and preview quiz, maching prompts should be correct

Change-Id: I9ce30aef94769bf353fface3e5ea656af3dfbc5b
Reviewed-on: https://gerrit.instructure.com/57238
Tested-by: Jenkins
Reviewed-by: Ryan Taylor <[email protected]>
QA-Review: Michael Hargiss <[email protected]>
Product-Review: Brian Finney <[email protected]>

public/javascripts/quizzes.js

@@ -280,7 +280,7 @@ define([
         htmlValues: ['answer_html', 'answer_match_left_html']
       });
 
-      addHTMLFeedback($answer, answer, 'answer_comment');
+      addHTMLFeedback($answer.find('.answer_comments'), answer, 'answer_comment');
 
       if (answer.answer_weight > 0) {
         $answer.addClass('correct_answer');