Settings: Forward port Expanded desktop capability

Originally authored by Jesús David and ported from
        ParanoidAndroid ICS branch

Change-Id: Iad1be66f48db2fe022a87822a092d6606c2a6477

Conflicts:
	res/values/config.xml
Settings: Default the old CM Power widget to OFF
and fix DERP!

THe Power widget functionality will be replaced by the new QuickSettings
functionality of Android 4.2.  Turn the old CM widget off by default.

Change-Id: I9144130898aff1fb9f882aaf68a3b0873742f3d6