rgbled fixes and changes in status indication

Status indication:
 - STANDBY: breathing, BLUE = no pos lock, GREEN = has pos lock, ORANGE = low batt
 - ARMED: solid, BLUE = no pos lock, GREEN = has pos lock, ORANGE = low batt
 - ARMED ERROR (e.g.critical batt): fast blinking, RED
 - STANDBY ERROR (e.g.critical batt): normal blinking, RED

Commands/state transition confirmation (triple blink):
 - negative: RED
 - neutral: WHITE
 - positive: GREEN