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 'upstream/cm-10.1' into cm-10.1-dev