Allow other users to modify button settings

Change-Id: Id3b16f3fa3f1e7a8eaef42cfdc12e93dff3fed9b
Extended QS style options (2/2)

This is implemenation is based on: https://github.com/SlimRoms/packages_apps_Settings/commit/8d3a8c9a5d9f86a885b39c608d22d77e9e545232
Thanks to kufikugel!

Change-Id: I43a51672cbb8edb2b68680a45f1bc9f65526f1d2
Merge pull request #1 from cristianomatos/cr-main-10.2

daily sync