mozilla side changes for bugscape 16296. r-blake, sr-ben. Given the Component id and panel, open the component and select the panel in the pref window.

suite/common/pref/nsPrefWindow.js

@@ -376,9 +376,13 @@ nsPrefWindow.prototype =
         {
           var panelTree = document.getElementById( "prefsTree" );
           var selectItem = document.getElementById( aSelectItem );
-          var index = panelTree.contentView.getIndexOfItem( selectItem );
-          if ( !panelTree.view.isContainerOpen( index ) )
-            panelTree.view.toggleOpenState(index);
+          var selectItemroot = document.getElementById( aComponentName );
+          var parentIndex = panelTree.contentView.getIndexOfItem( selectItemroot );
+          if (parentIndex != -1 && !panelTree.view.isContainerOpen(parentIndex))
+             panelTree.view.toggleOpenState(parentIndex);
+          var index = panelTree.view.getIndexOfItem( selectItem );
+          if (index == -1)
+            return;
           panelTree.treeBoxObject.selection.select( index );
         }