Discarding changes in the preview (spacebar) forces the preview to close

If you click the `Discard...` button in the preview windows (spacebar) the preview will close.

<img width="375" height="213" alt="Image" src="https://github.com/user-attachments/assets/ae51fb90-513c-4cca-a8b6-a45d0e1351a1" />