Settings: Remove unneeded 'category_gamma_title'

Change-Id: I448ed3409531d97134f1befb785a042252164dba
QuickSettings : Don't allow duplicate tiles

Don't allow user to add duplicate quick settings tiles

Change-Id: I7614fce2b5ffa0070c834b5de14b039c7b768b9f
Merge "QuickSettings : Don't allow duplicate tiles" into cm-10.2
Merge branch 'cm-10.2' into martincz