fix conflict, btns,collections

backstage/templates/layout.html

@@ -117,6 +117,7 @@
       </div>
     </div><!-- body-row END -->
   </div><!-- container -->
+  </div>
   <!-- partial -->
   <script src='https://code.jquery.com/jquery-3.2.1.slim.min.js'></script>
   <script src='https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.12.9/umd/popper.min.js'></script>