HOTFIX crash on initializing popup window for surtain monitors

Author: DirkDoes

WheelWizard/Views/Popups/Base/PopupWindow.axaml.cs

@@ -116,6 +116,9 @@ protected override void OnResized(WindowResizedEventArgs e)
     {
         base.OnResized(e);
 
+        if (CompleteBorder == null)
+            return;
+
         CompleteBorder.Measure(new(double.PositiveInfinity, double.PositiveInfinity));
         var desiredSize = CompleteBorder.DesiredSize;
         SetWindowSize(desiredSize);