Feature Request: Option to swap ok and back button

[YveIce]

I miss an option to swap the ok and the back button, like batocera has for example.
I'm used to press the "south" button for ok (X on Dualshock 3), and the "east" one (Circle on Dualshock 3) for back/abort.

[bagelbyheart]

Hopefully the pull request above will get approved to handle this.