Makes clear that check_updates_vm is just the default for new VMs and
replaces some more instances of VM with qube. (Note: the size change
is deliberate)
fixesQubesOS/qubes-issues#3732
* qubesos/pr/80:
changes as requested by @marmarek
Minor textual update for Global Settings
While resolving conflict, reverted global settings window size to sane
value.
In lieu of bigger overhaul/processing policy files in
VM Settings, a bit of explanation for updateVM in Global
Settings and a change of name from UpdateVM to Dom0 Update VM
there. This is quick fix solution, pending a better
one when (hopefully) we get some better API for
interacting with policies.
references QubesOS/qubes-issues#3412
