Navbar : Lock current orientation in edit mode

Freeze current orientation during edit mode.
Jira : https://jira.cyanogenmod.org/browse/CYAN-1117

Change-Id: I61a852855b70011291a242f3068f67336ba61131
Merge "Navbar : Lock current orientation in edit mode" into cm-10.1
Merge remote-tracking branch 'cm/cm-10.1' into cm-10.1

Conflicts:
	src/com/android/settings/cyanogenmod/NavBar.java

Change-Id: I56ec4d3a8e56cda1e0f46fb2426eb7a1d491e672
Merge remote-tracking branch 'upstream/cm-10.1' into cm-10.1