Enable user flagging feature

client/index.html

@@ -42,7 +42,7 @@
   </div>
 
   <div id="calc-flagging-tab"
-    style="position:absolute;visibility: hidden; display: none;">
+    style="position:absolute;visibility: hidden; ">
     Report error
   </div>
 
@@ -114,6 +114,6 @@
   </div>
 
 <!-- <script type='text/javascript' src='http://www.x3dom.org/download/x3dom.js'> </script>-->
-  <script type="text/javascript" src="bundle-es5.js" charset="utf-8"></script>
+  <script type="text/javascript" src="bundle.js" charset="utf-8"></script>
 </body>
 </html>