Close the global actions menu when the screen goes off.

Close the global actions menu when the screen goes off.

Previously, the global actions menu was closed when the keyguard was shown, but
when the menu was shown from within the keyguard, it wasn't closed ever again
when the screen goes off.  That had the result that if your pocket managed to
bring up the dialog, the menu would likely never go away on its own, and
eventually do something awful like go into airplane mode.