Stop the search search button from crashing stocks2

sky/sdk/lib/framework/editing2/input.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 'dart:sky' as sky;
 
 import '../rendering/flex.dart';
 import '../widgets/wrappers.dart';
 import 'editable_string.dart';
 import 'editable_text.dart';
@@ skipping 72 matching lines @@
           // style: _placeholderStyle,
           child: new Text(placeholder)
       ));
     }
 
     children.add(new EditableText(value: _editableValue, focused: focused));
 
     return new EventListenerNode(
       // style: _style,
       // inlineStyle: focused ? _focusedInlineStyle : null,
-      new Flex(children, direction: FlexDirection.vertical),
+      new Stack(children),
       onPointerDown: (sky.Event e) => keyboard.showByRequest()
     );
   }
 
   void didUnmount() {
     if (_isAttachedToKeyboard)
       keyboard.hide();
     super.didUnmount();
   }
 
 }