Revert "Halo: Add master switch to disable Halo (1/2)"

This reverts commit 50ec1ec15a1c866adcbe0c299c2acece52bab507.
Halo: Add master switch to disable Halo (1/2)
Port master switch from @Der-Schubi. Fixed Halo not showed at first notifiction drop.
Merge remote-tracking branch 'revolt/revolt' into revolt