Fixed exceptions in dispose not allowing PT Run to terminate (#5615)

src/modules/launcher/PowerLauncher/App.xaml.cs

@@ -59,9 +59,16 @@ namespace PowerLauncher
         private void OnStartup(object sender, StartupEventArgs e)
         {
             RunnerHelper.WaitForPowerToysRunner(_powerToysPid, () =>
+            {
+                try
                 {
                     Dispose();
+                }
+                finally
+                {
+
                     Environment.Exit(0);
+                }
             });
 
             var bootTime = new System.Diagnostics.Stopwatch();