util/liveiso/nixos/graphical: Preconfigure some Gnome settings
These settings are not a must, but nice to have. The most noteworthy
setting is `sleep-inactive-ac-type`, which is set to `nothing` so that
the target doesn't go into suspend when AC is used as power supply and
it's unused for a while.
Change-Id: I9a6e3eb88427f94f504a6b991a98b1b51e11bc19
Signed-off-by: Felix Singer <felixsinger@posteo.net>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/83853
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Matt DeVillier <matt.devillier@gmail.com>
Reviewed-by: Jan Philipp Groß <jeangrande@mailbox.org>