Smoother keyboard input — ZukuRace Steam update #47820

Throttle and braking values were too big and too instant at zero speed. It was impossible to drive smoothly, when you are slow, too much wheel spin. But now the car throttle and braking are limited at low speed, when you are driving with a keyboard. Steering with keyboard is smoother as well. So, keyboard driving seems to be easier (the game is gamepad-oriented anyway). Steering assist settings have changed, trailbraking works. But the car tends to oversteer when braking, release steering or braking in time.