Port Forward: custom lockscreen targets
PowerWidget: fix airplane mode toggle

Settings.System -> Settings.Global

Change-Id: Ic1a874ec694e76153d0838fdb81650fe384bae59
GlowPadView : Re-enable magneticTargets

Re-enable magneticTargets and add logic to make it
compatible with lockscreen shortcuts.

Change-Id: I523141f03566804888fde08a116f73ea62ca523e