fix(panel/hints): resolve layout issue with multiple categories

panel/hints/hints.html

@@ -1,10 +1,15 @@
 <div class="sidebar-pane-stack audit-result-view fill visible" ng-controller="HintController">
 
+  <div></div>
+
   <div class="sidebar-pane-title expanded"
-       ng-repeat="(groupName, group) in groupedHints">{{groupName}}
+       ng-repeat-start="(groupName, group) in groupedHints">{{groupName}}
     <div class="sidebar-pane-toolbar"></div>
+  </div>
 
-    <div class="sidebar-pane visible" ng-repeat="(summary, hints) in group">
+  <div class="sidebar-pane visible"
+       ng-repeat-end
+       ng-repeat="(summary, hints) in group">
     <div class="body audit-result-tree">
       <ol>
         <li class="parent audit-result">
@@ -20,5 +25,4 @@
     </div>
   </div>
 
-  </div>
 </div>