Added workaround for invalidation issue in pan/zoom elements

src/Artemis.UI/Screens/SurfaceEditor/SurfaceEditorView.axaml.cs

@@ -48,6 +48,11 @@ public partial class SurfaceEditorView : ReactiveUserControl<SurfaceEditorViewMo
     private void UpdateZoomBorderBackground()
     {
         if (ContainerZoomBorder.Background is VisualBrush visualBrush)
+        {
             visualBrush.DestinationRect = new RelativeRect(ContainerZoomBorder.OffsetX * -1, ContainerZoomBorder.OffsetY * -1, 20, 20, RelativeUnit.Absolute);
+            // Workaround
+            // This fixes an issue where the container is not invalidated, which leaves behind a 'smear' since Avalonia 11 rc1, check if still required later
+            ContainerZoomBorder.InvalidateVisual();
+        }
     }
 }