[Suggestion] Make it possible for Accelerate and Brake to share the same controls as Steer Up and Steer Down for easier weight transfer on air

[nfc2005]

Steer Left and Steer Right by default also work as weight transfer controls pressing S while on air, but the same doesn't apply to Steer Up and Steer Down, they are separate and cannot be mapped to the same keys as Accelerate and Brake.