fix so that dash list panel are rendered correctly

This resolves issue with dash list panel getting scrollbars
    attached to incorrect elements. Now the panel content are
    rendered correctly and all content are displayed as
    expected.

public/app/plugins/panel/dashlist/module.html

-<div class="dashlist" ng-repeat="group in ctrl.groups">
+<div>
+  <div class="dashlist" ng-repeat="group in ctrl.groups">
     <div class="dashlist-section" ng-if="group.show">
       <h6 class="dashlist-section-header" ng-show="ctrl.panel.headings">
         {{group.header}}
@@ -14,4 +15,5 @@
         </a>
       </div>
     </div>
+  </div>
 </div>