PowerWidget: fix airplane mode toggle

Settings.System -> Settings.Global

Change-Id: Ic1a874ec694e76153d0838fdb81650fe384bae59
GpsQuickTile : Set label correctly

Apply label onPostCreate

Change-Id: Id7fd61fa9ab37257b81167e53c7976310543ea94
QuickSettings : Cleanup

Change-Id: I044f8c0914c725af5894ffb70e8ac54b6e19dc43