Add wrapper to discussion topic dropdown.

common/static/coffee/spec/discussion/discussion_spec_helper.coffee

@@ -405,6 +405,7 @@ browser and pasting the output.  When that file changes, this one should be rege
 </script>
 
 <script aria-hidden="true" type="text/template" id="topic-template">
+    <div class="topic-wrapper">
       <div class="field-label">
           <span class="field-label-text">Topic Area:</span><div class="field-input post-topic">
               <a href="#" class="post-topic-button">
@@ -423,6 +424,7 @@ browser and pasting the output.  When that file changes, this one should be rege
       </div><span class="field-help">
           Add your post to a relevant topic to help others find it.
       </span>
+    </div>
 </script>
 
 

common/templates/discussion/_underscore_templates.html

@@ -486,6 +486,7 @@ from django_comment_client.permissions import has_permission
 
 <script aria-hidden="true" type="text/template" id="topic-template">
     ## Using div here instead of label because we are using a non-native control
+    <div class="topic-wrapper">
         <div class="field-label">
             <span class="field-label-text">${_("Topic Area:")}</span><div class="field-input post-topic">
                 <a href="#" class="post-topic-button">
@@ -504,6 +505,7 @@ from django_comment_client.permissions import has_permission
         </div><span class="field-help" id="field_help_topic_area">
             ${_("Add your post to a relevant topic to help others find it.")}
         </span>
+    </div>
 </script>
 
 <%def name="primaryAction(action_class, icon, sr_label, unchecked_label, checked_label)">