GUI shutdown related options are presently Halt and Shutdown -- Could we
have an explicit Powerdown or Poweroff option --
Perhaps also in the TUI
shutdown -p now
to shutdown with power off both ATX and laptops.
TUI cross-referenced at:
gdm.conf should have HaltCommand changed to poweroff
In latest tree gdm now powers off when you choose the Halt menu item.
Will rename Halt menu item to Shut Down but doing that in upstream sources,
it may not happen for this release (breaks translations).
Anyhow, Halt now powers off.