Design Surface should Handle RequestbringIntoView of the ScrollViewer!

When not, sometimes when you Select Controls you move them Around even if you don't want to do this, because the Scrollviewer Scrolls
while Mouse Button is pressed!

src/AddIns/DisplayBindings/WpfDesign/WpfDesign.Designer/Project/DesignSurface.cs

@@ -67,12 +67,18 @@ namespace ICSharpCode.WpfDesign.Designer
 		{
 			_partDesignContent = this.Template.FindName("PART_DesignContent", this) as ContentControl;
 			_partDesignContent.Content = _designPanel;
+			_partDesignContent.RequestBringIntoView += _partDesignContent_RequestBringIntoView;
 
 			this.ZoomControl = this.Template.FindName("PART_Zoom", this) as ZoomControl;
 			
 			base.OnApplyTemplate();
 		}
 
+		void _partDesignContent_RequestBringIntoView(object sender, RequestBringIntoViewEventArgs e)
+		{
+			e.Handled = true;
+		}
+
 		protected override void OnPreviewMouseLeftButtonDown(MouseButtonEventArgs e)
 		{
 			if (ZoomControl != null && e.OriginalSource == ZoomControl)