Bug#1033622: gnome-boxes: EFI option silently breaks snapshots

[Jeremy Bícha]

Source: gnome-boxes
Version: 43.2-1
Forwarded: https://gitlab.gnome.org/GNOME/gnome-boxes/-/issues/920

When I click the Create a Virtual Machine button, I often choose the
"Use EFI" option. I did not realize that this breaks snapshots because
the app doesn't tell me that it will. Also, the snapshot UI is still
there; it just doesn't work.

I wanted to just remove the Use EFI option, but there are some use cases for it.

Thank you,
Jeremy Bícha