* Radio Master Bandit 5-Way Joystick: first draft
Untested on genuine hardware
* "Okay" moves to next frame, even when canned message disabled
* Refactor to allow easier customization
* Implement feedback from testing
* guard toggleGPS()
* show "Shutting down.." screen
* split adhoc ping alert onto two lines
* Don't block while waiting for shutdown
Was preventing the alert from showing
