Settings: enable only one navbar overlay at a time

* this fixes fullscreen gestures not working for some users
* also make sure to enable the right overlay (fullscreen / normal) when switching to gesture mode from two / three button mode

Signed-off-by: jhonboy121 <alfredmathew05@gmail.com>
Change-Id: I37bdb7ec5f7c93c2ebad79ff85619e4adf921c8a
2 files changed