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

Change-Id: Iaa837b52b993f168d0eb3b8ba806304c7f3fe588

Conflicts:
	res/values/cm_strings.xml
	src/com/android/settings/cyanogenmod/HardwareKeys.java
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

Conflicts:
	res/xml/hardware_keys.xml
	src/com/android/settings/cyanogenmod/BootReceiver.java
	src/com/android/settings/cyanogenmod/HardwareKeys.java
Merge branch 'jb43-legacy' of https://github.com/ParanoidAndroid/android_packages_apps_Settings into jb4.3