Feature: Force rearming plane to leave airpad

[ghost]

The feature allows a plane to move off the airpad it is rearming itself at, without waitting for the rearm to complete. Issued as a modified move command alt+right click. The plane takes of, relocates to the end of the move command and does not queue a rearm after the move command. Issued with space+move, the plane takes takes off moves away from the pad to the end of the move command and returns to the same pad. Issued with ctrl+alt+move, the plane moves away from the pad to the end of the move command and queues a rearm command to the nearest available pad.