Stop the timer after the runsessionform has been closed.

Author: naseif

Source/VisualPairCoding/VisualPairCoding.AvaloniaUI/RunSessionForm.axaml.cs

@@ -84,6 +84,8 @@ private void OnPointerLeave(object? sender, PointerEventArgs e)
 
         private void CloseForm(object sender, RoutedEventArgs args)
         {
+            timer.IsEnabled = false;
+            timer.Stop();
             Close();
         }