add sleep for 50ms after any update to the joystick

(seems to) prevent flickering Joystick LEDs when there is a high update
rate
Merge branch 'hotfix/update_problem'
Merge branch 'master' into dev
Merge branch 'dev' into feature/doc
update led topic

now fire button is also an array member of color_led
Merge branch 'dev' into feature/doc