completed the branch

src/Shared/HandyControl_Shared/Controls/Growl/GrowlWindow.cs

@@ -1,8 +1,5 @@
-using System;
-using System.Windows;
+using System.Windows;
 using System.Windows.Controls;
-using System.Windows.Interop;
-using HandyControl.Tools.Interop;
 
 namespace HandyControl.Controls
 {
@@ -26,16 +23,6 @@ namespace HandyControl.Controls
             GrowlPanel = GetTemplateChild(ElementGrowPanel) as Panel;
         }
 
-        protected override void OnSourceInitialized(EventArgs e)
-        {
-            base.OnSourceInitialized(e);
-
-            var _ = new WindowInteropHelper(this)
-            {
-                Owner = NativeMethods.GetDesktopWindow()
-            };
-        }
-
         public void Init()
         {
             var desktopWorkingArea = SystemParameters.WorkArea;