attempt at making menuitems react

sky/examples/fn/widgets/radio.dart

 part of widgets;
 
 class Radio extends ButtonBase {
 
   Object value;
   Object groupValue;
   ValueChanged onChanged;
 
   static Style _style = new Style('''
+    transform: translateX(0);
     display: inline-block;
     -webkit-user-select: none;
     width: 14px;
     height: 14px;
     border-radius: 7px;
     border: 1px solid blue;
     margin: 0 5px;'''
   );
 
   static Style _highlightStyle = new Style('''
+    transform: translateX(0);
     display: inline-block;
     -webkit-user-select: none;
     width: 14px;
     height: 14px;
     border-radius: 7px;
     border: 1px solid blue;
     margin: 0 5px;
     background-color: orange;'''
   );
 
@@ skipping 14 matching lines @@
   }) : super(key: key);
 
   Node render() {
     return new Container(
       style: _highlight ? _highlightStyle : _style,
       onClick: _handleClick,
       onPointerDown: _handlePointerDown,
       onPointerUp: _handlePointerUp,
       onPointerCancel: _handlePointerCancel,
       children: value == groupValue ?
-          [new Container( style : _dotStyle )] : null
+          [super.render(), new Container( style : _dotStyle )] : [super.render()]
     );
   }
 
   void _handleClick(sky.Event e) {
     onChanged(value);
   }
 }