fix: app crashes when Return key is pressed while current action is already running (#1035)

Signed-off-by: leo <[email protected]>

Author: love-linger

src/ViewModels/LauncherPage.cs

@@ -71,7 +71,7 @@ public void StartPopup(Popup popup)
 
         public async void ProcessPopup()
         {
-            if (_popup != null)
+            if (_popup is { InProgress: false })
             {
                 if (!_popup.Check())
                     return;