Merge pull request #1303 from edx/db/source-edit-leanModal

source-edit.html depends on leanModal

cms/templates/widgets/source-edit.html

@@ -28,7 +28,7 @@
   </section>
 
   <script type = "text/javascript">
-require(["jquery", "codemirror/stex"], function($) {
+require(["jquery", "jquery.leanModal", "codemirror/stex"], function($) {
   hlstrig = $('#hls-trig-${hlskey}');
   hlsmodal = $('#hls-modal-${hlskey}');