[1/2] Settings: HALO

Forward port from jb43.

PS1: Initial port
PS2: Fix conflicts with notification LED
PS3: FIx derp in strings
PS4: Fix derp in pa_arrays (tag not closed)
PS5: HALO Mods

Change-Id: I7de6a9157415fe05b0a59d8260e33cc1527a342d
Signed-off-by: Scott <scott@ubuntu>