trivial: make verify and verify-update safer
trivial: make verify and verify-update safer

Don't show output for all devices - it doesn't work for most of them.

I also found that running verify on my Synaptics touchpad device puts it
into a pretty bad state until reboot.  That's of course a problem on
it's own, but at least prompting for it will prevent it from easily
happening.

fwupd/fwupd,hughsie/fwupd,fwupd/fwupd,hughsie/fwupd,hughsie/fwupd,hughsie/fwupd,fwupd/fwupd,fwupd/fwupd