[Effen] Make the stock app use the radio button widget so that it's being tested.

sky/framework/components/menu_item.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 '../fn.dart';
+import '../layout.dart';
 import 'button_base.dart';
 import 'icon.dart';
 import 'ink_well.dart';
 
 class MenuItem extends ButtonBase {
   static final Style _style = new Style('''
     align-items: center;
     height: 48px;
     -webkit-user-select: none;'''
   );
 
   static final Style _highlightStyle = new Style('''
     align-items: center;
     height: 48px;
     background: rgba(153, 153, 153, 0.4);
     -webkit-user-select: none;'''
   );
 
   static final Style _iconStyle = new Style('''
     padding: 0px 16px;'''
   );
 
   static final Style _labelStyle = new Style('''
     padding: 0px 16px;
     flex: 1;'''
   );
 
   List<UINode> children;
   String icon;
+  GestureEventListener onGestureTap;
 
-  MenuItem({ Object key, this.icon, this.children }) : super(key: key);
+  MenuItem({ Object key, this.icon, this.children, this.onGestureTap }) : super(key: key);
 
   UINode buildContent() {
-    return new StyleNode(
-      new InkWell(
-        children: [
-          new StyleNode(
-            new Icon(
-              size: 24,
-              type: "${icon}_grey600"
+    return new EventListenerNode(
+      new StyleNode(
+        new InkWell(
+          children: [
+            new StyleNode(
+              new Icon(
+                size: 24,
+                type: "${icon}_grey600"
+              ),
+              _iconStyle
             ),
-            _iconStyle
-          ),
-          new Container(
-            style: _labelStyle,
-            children: children
-          )
-        ]
+            new FlexContainer(
+              direction: FlexDirection.Row,
+              style: _labelStyle,
+              children: children
+            )
+          ]
+        ),
+        highlight ? _highlightStyle : _style
       ),
-      highlight ? _highlightStyle : _style
+      onGestureTap: onGestureTap
     );
   }
 }