Move subscribe box out of other comments container

app/assets/stylesheets/request-for-comments.css.scss

@@ -127,12 +127,12 @@
       }
     }
   }
+}
 
 input#subscribe {
   margin-top: 5px;
   margin-right: 5px;
 }
-}
 
 #myComment {
   margin-top: 20px;

app/views/exercises/_comment_dialogcontent.html.slim

@@ -1,6 +1,7 @@
 #otherComments
   h5 =t('exercises.implement.comment.others')
   .container
+
 label
   input#subscribe type='checkbox' title=t('request_for_comments.subscribe_to_author') data-subscription=Subscription.where(user: current_user, request_for_comment_id: @request_for_comment.id, subscription_type: 'author', deleted: false).try(:first).try(:id)
   = t('request_for_comments.subscribe_to_author')