Refactor fn2.dart, since it breached our 1000-line threshold.

sky/sdk/lib/framework/editing2/editable_text.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 '../fn2.dart';
-import '../theme/colors.dart';
 import 'dart:async';
+
+import '../widgets/wrappers.dart';
 import 'editable_string.dart';
 
 class EditableText extends Component {
 
   EditableText({Object key, this.value, this.focused})
       : super(key: key, stateful: true);
 
   // static final Style _cursorStyle = new Style('''
   //   width: 2px;
   //   height: 1.2em;
@@ skipping 79 matching lines @@
     //   children.add(new Container(
     //     key: 'cursor',
     //     // style: _cursorStyle
     //     ));
 
     return new Paragraph(
       text: hack
     );
   }
 }