Enable custom actions for double tap home (2/2)

Change-Id: Iaa837b52b993f168d0eb3b8ba806304c7f3fe588
Re-add link to DeviceParts.

Change-Id: Ib595b81a11e19f8526e532400e57f5771db09499
Button & keyboard backlight brightness adjustment (1/2)

PS2: move from display to button settings
PS3: fix tab

Signed-off-by: Michael Bestas <mikeioannina@gmail.com>

Change-Id: I35a6d149affc1da08707b7c40fb02761321cba41
Merge "Enable custom actions for double tap home (2/2)" into cm-10.2
Merge remote-tracking branch 'cm/cm-10.2' into cm-10.2