Новые ассеты, диалог выглядит в стиле приложения

lib/base_state.dart

@@ -11,8 +11,6 @@ abstract class BaseState<T> extends State<T> {
   String error = null;
   String textFieldValue = '';
 
-  TextEditingController controller = new TextEditingController();
-
   @override Widget build(BuildContext context) {
     return new Scaffold(appBar: getAppBar(context), body: getBody(context));
   }
@@ -108,7 +106,6 @@ abstract class BaseState<T> extends State<T> {
   	return new TextField(keyboardType: TextInputType.number,
   	 decoration: new InputDecoration.collapsed(hintText: getHint(),
       hintStyle: new TextStyle(color: greyTextColor, fontSize: 16.0)),
-      controller: controller,
       onChanged: (text) => handleUserInput(text));
   }