modify growlparent‘s initialization mode

HandyControlDemo/MainWindow.xaml

@@ -30,7 +30,7 @@
         <userControl:MainContent Grid.Column="1"/>
         <GridSplitter Grid.Column="1" HorizontalAlignment="Left" Width="4" Background="Transparent" BorderThickness="1,0,0,0" BorderBrush="{DynamicResource BorderBrush}"/>
         <controls:ScrollViewer Grid.Column="1" VerticalScrollBarVisibility="Hidden" HorizontalAlignment="Right" IsEnableInertia="True" IsPenetrating="True">
-            <StackPanel IsHitTestVisible="True" VerticalAlignment="Top" Background="Transparent" Name="PanelMessage" Margin="0,10,10,10"/>
+            <StackPanel controls:Growl.GrowlParent="True" VerticalAlignment="Top" Margin="0,10,10,10"/>
         </controls:ScrollViewer>
     </Grid>
 </controls:WindowBorderless>