Merge pull request #1446 from edx/flowerhack/fix/legacyemailjs

Fixed a bug where legacy instructor dash's email editor failed to load

lms/templates/courseware/instructor_dashboard.html

@@ -546,11 +546,13 @@ function goto( mode)
       <input type="submit" name="action" value="Send email">
     </div>
     <script type="text/javascript">
-      var emailEditor = XBlock.initializeBlock($('.xblock-studio_view'));
-      document.idashform.onsubmit = function() {
-        this.message.value = emailEditor.save()['data'];
-        return true;
-      }
+      $(document).ready(function(){
+        var emailEditor = XBlock.initializeBlock($('.xblock-studio_view'));
+        document.idashform.onsubmit = function() {
+          this.message.value = emailEditor.save()['data'];
+          return true;
+        }
+      });
     </script>
 
     <p>These email actions run in the background, and status for active email tasks will appear in a table below.