Settings : Port lockscreen shortcut configuration

Port lockscreen configuration from cm-10.2

Change-Id: Ib4fd41f747912cc741eca1983c5f56df56176aad
Update Simplified Chinese translations

Change-Id: I227cb9aff5cf349764725670c9bb248b085cc84a
Settings: merge CyanogenMod

Change-Id: I437c9260ac6a1fe08d38c6df2db9adbedc33214c