Settings: cleanup, fixes, etc

ahhhhhh... much better

Change-Id: I00805fd903609a5f2740f0b54babdd999c115960
PS1: refactor statusbar mods to it's own class and header
PS2: forgot to add fragment in manifest
PS3: NPE from copy pasta mishap
PS4: some capitalization fixes
fix a minor context leak in vanir settings

Change-Id: Iaf10643deff3a694bfd00c804f091c1343325514