App becomes non-responsive if shared directory is moved

After moving a shared directory (say from `~/dir1/shared_dir` to `~/shared_dir`), UTM will freeze and go non-responsive (beach ball spinner too) when the "Browse" button is clicked for changing the shared directory; both the buttons in the main VM screen and in the VM's settings within the Sharing tab cause this. Clicking "Clear" next to the "Browse" button does not help, nor does force closing UTM.

Recreating the shared directory's original path (ie `mkdir -p ~/dir1/shared_dir`) will prevent the freeze and allow the user to select the correct path (`~/shared_dir`). It seems the app is getting upset when the old path no longer exists, but provides no indication of this.

* UTM Version: 4.3.5 (87)
* macOS Version: 14 (Sonoma, Build 23A5337a), appears on 13 (Ventura) as well
* Mac Chip: M2 Max

No crash log appears for UTM, nor any QEMU programs/runners.