js2-mode is no longer developed and we recommend js-mode these days,
so switch the modelines to specify that, and make them consistent
across all files.
https://bugzilla.gnome.org/show_bug.cgi?id=660358
Making users have to log in to power off the machine isn't a good idea.
This commit adds a power menu similar to the one in the fallback greeter
which offers 3 items:
- Suspend
- Restart
- Power off
https://bugzilla.gnome.org/show_bug.cgi?id=657822