(1) The correct verb is "Shut down". (2) It doesn't matter
because the preferred term is "Power off", verified with the
design team.
Spotted by Shaun McCance <shaunm@gnome.org>
https://bugzilla.gnome.org/show_bug.cgi?id=661559
During a split second we see some garbage on the screen on
desktop systems that don't have UPSes. Better to grow than to
shrink (though we shouldn't do either), so start with the battery
information hidden.
Add mnemonics to all items. We may need to revisit this and set
labeled-by relations for the combo boxes where the labels are
checkboxes (in that case, the mnemonic automatism doesn't really
work, I think).
Part of bug 650132
