Revert modifications to `getParentAndGrandparent`

ui/javascripts/app/routes.js

@@ -19,11 +19,7 @@ App.BaseRoute = Ember.Route.extend({
       grandParentKey = parts.join("/") + "/";
     }
 
-    return {
-      parent: parentKey,
-      grandParent: grandParentKey,
-      isRoot: parentKey === '/'
-    }
+    return {grandParent: grandParentKey, parent: parentKey}
   },
 
   removeDuplicateKeys: function(keys, matcher) {
@@ -135,7 +131,7 @@ App.KvShowRoute = App.BaseRoute.extend({
     controller.set('content', models.keys);
     controller.set('parentKey', parentKeys.parent);
     controller.set('grandParentKey', parentKeys.grandParent);
-    controller.set('isRoot', parentKeys.isRoot);
+    controller.set('isRoot', parentKeys.parent === '/');
     controller.set('newKey', App.Key.create());
   }
 });