RC: Powermenu styling update - based on trello

PS2: Adjust Preference behavior too

Change-Id: Ie65d747c20ccc5c3ae0db6a01e9318f1d2646d52
Signed-off-by: Gergely Szell (sethyx) <szell@hu.ibm.com>
RC: Fix charging LED and LED brightness settings

I know it's not a good practice to have a separate function with only
one line, but for code cleanness I kept setSystemProp.

Change-Id: I7ff0370fa9028504f898dfbb0100316753a5d5b5
Signed-off-by: Gergely Szell (sethyx) <szell@hu.ibm.com>
StatusbarToggles: fix StringIndexOutOfBoundsException

PS2: Simplify

Change-Id: I9c571dd86e6cd4bd3ae0d43cb642e71df929c0a3
Signed-off-by: Dirk Rettschlag <dirk.rettschlag@gmail.com>