Settings menu item in stock2 doesn't work

sky/sdk/lib/widgets/basic.dart

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 import 'package:vector_math/vector_math.dart';
 
 import '../rendering/block.dart';
 import '../rendering/box.dart';
 import '../rendering/flex.dart';
 import '../rendering/object.dart';
 import '../rendering/paragraph.dart';
 import '../rendering/stack.dart';
 import 'widget.dart';
 
 export '../rendering/box.dart' show BoxConstraints, BoxDecoration, Border, BorderSide, EdgeDims;
 export '../rendering/flex.dart' show FlexDirection, FlexJustifyContent, FlexAlignItems;
 export '../rendering/object.dart' show Point, Size, Rect, Color, Paint, Path;
-export 'widget.dart' show Widget, Component, App, Listener, ParentDataNode;
+export 'widget.dart' show Widget, Component, App, runApp, Listener, ParentDataNode;
 
 
 // PAINTING NODES
 
 class Opacity extends OneChildRenderObjectWrapper {
   Opacity({ String key, this.opacity, Widget child })
     : super(key: key, child: child);
 
   RenderOpacity get root => super.root;
   final double opacity;
@@ skipping 394 matching lines @@
     }
   }
 
   void insert(RenderObjectWrapper child, dynamic slot) {
     assert(false);
     // WidgetToRenderBoxAdapter cannot have Widget children; by
     // definition, it is the transition out of the Widget world.
   }
 
 }