Horizontal boost for gamepad

[SoltyBadger]

With the discovery of the Alt jump binding to allow horizontal boost was a game changer however, gamepad can only bind a single jump option.

I found using WASD and pressing the jump button on gamepad will result in horizontal boost, except when using a gamepad and using jump/Alt jump on keyboard will result in ordinary boost. I'm unsure of the significance of this but it would seem directional boosting is dependent on directional input method.