holding shift key down does not reveal GRUB menu (edit)
https://bugzilla.redhat.com/show_bug.cgi?id=1880169


I'm not sure when this regression appeared. It was working with F32
VM's and I think also with some earlier F33 VMs.

Anyway, right now it's not working for me with either virt-manager or
baremetal (sample size of one each).

What about quickly pressing F8? On my baremetal, Shift doesn't work either. But as I remember, many BIOSes simply ignore keys which are pressed down during initialization, to prevent "stuck keys". That's why there are two different key options to display GRUB.