ux: pressing ESC will also clear notifications

Signed-off-by: leo <longshuang@msn.cn>

Author: love-linger

src/Views/Launcher.axaml.cs

@@ -299,6 +299,7 @@ protected override async void OnKeyDown(KeyEventArgs e)
             else if (e.Key == Key.Escape)
             {
                 vm.ActivePage.CancelPopup();
+                vm.ActivePage.Notifications.Clear();
                 e.Handled = true;
                 return;
             }