When a Distrobox is added after one was deleted, it can't be selected on any more

1. Create a Distrobox.
2. Delete this Distrobox.
3. Create another Distrobox.
4. Now you can't select it any more in the left menu. Clicking on it has no effect and the right side remains blank. Only a restart of DistroShelf helps.

<img width="917" height="789" alt="Image" src="https://github.com/user-attachments/assets/fe515672-0a2b-4279-9fd1-8337e02695de" />