remove dotted outline around buttons (fixes #98)
remove dotted outline around buttons (fixes #98)

mozilla/galaxy.js-mobile-gamepad,simudream/galaxy.js-mobile-gamepad,simudream/galaxy.js-mobile-gamepad,mozilla/galaxy.js-mobile-gamepad,simudream/galaxy.js-mobile-gamepad,mozilla/galaxy.js-mobile-gamepad,simudream/galaxy.js-mobile-gamepad,mozilla/galaxy.js-mobile-gamepad