Merge pull request #805 from worldofsites/master

Possible fix for issue #804

@@ -1044,7 +1044,7 @@ Since version 2.8 it is possible to access the properties
   }
 
   ///The window to which this binding is bound.
-  ui.Window get window => ui.window;
+  ui.SingletonFlutterWindow get window => ui.window;
 
   Locale get deviceLocale => window.locale;