Implement a new driving control mode

[RedderThanMisty]

Implement a new driving control mode that switches WASD from Pitch/Yaw to WheelDrive/Yaw.

Currently, reaction wheels on small rovers will still try to pitch when driving forward, causing the craft to flip over. (And leaving unicycles virtually useless)
The secondary control system I'm proposing would have the reaction control system disabled or put on standard stability assist and refuse input from W&S keys, while still allowing for A&D to turn. This control system could also automatically revert to the primary control system if the rover is detected to have left the ground, re-enabling pitch controls.

[pandaman]

I like the idea, but I can forsee some implementation issues and strange behaviour if it needs to detect if it has left the ground.

[Bingmao]

You could also define an action group to turn on/off the stability assist and/or reaction wheel controll. You can also combine this group with the wheels drive/steering. So you can toggle between two defined steering modes