Adds a race start assistance system that allows the pilot to pitch forward and then release the sticks with the quad holding position for the race start.
The MOTOR_STOP logic is designed to stop the motors if:
1. MOTOR_STOP feature is enabled
2. Airmode is disabled
3. Throttle is at minimum
The problem is that this also applied during GPS Rescue and if the pilot had these conditions the motors would stop. Changed to disable MOTOR_STOP while GPS Rescue is active.
Also if stick-arming is used the MOTOR_STOP logic also will auto-disarm after 5 seconds (auto_disarm_delay). Disable this also when GPS Rescue is active.
Fix code path that could prevent the auto-disarm timer from being reset leading to a possible immediate disarm if airmode was switched off while in flight.
Previously the logic would process all possible ranges defined by MAX_ADJUSTMENT_RANGE_COUNT even if some (or even all) ranges were not configured. This change first builds a list of configured ranges and only processes thos entries.
Reduces CPU load by skipping unnecessary processing and minimizes the impact of increasing the number of available ranges.
