Merge pull request #5966 from Stanford-Online/kluo/help-modal-id

Fix help modal css selector

lms/templates/help_modal.html

@@ -149,7 +149,7 @@
 <script type="text/javascript">
 (function() {
     var onModalClose = function() {
-            $(".help-modal .close-modal").off("click");
+            $("#help-modal .close-modal").off("click");
             $("#lean_overlay").off("click");
             $("#help-modal").attr("aria-hidden", "true");
             $('area,input,select,textarea,button').removeAttr('tabindex');