ignore possible exceptions on closing flyout (thank you telerik...)

Pilz.UI.Telerik/Dialogs/RadFlyoutBase.Statics.cs

@@ -116,8 +116,20 @@ partial class RadFlyoutBase
             throw new NullReferenceException(nameof(ParentContext));
 
         if (ParentContext is null)
-            RadFlyoutManager.Close();
+            TryCloseFlyout();
         else
-            ParentContext.BeginInvoke(RadFlyoutManager.Close);
+            ParentContext.BeginInvoke(TryCloseFlyout);
+    }
+
+    private static void TryCloseFlyout()
+    {
+        try
+        {
+            RadFlyoutManager.Close();
+        }
+        catch (Exception)
+        {
+            // Ignore
+        }
     }
 }