Fix transition condition for the one pedal mode

[jiwoop]

Currently, one pedal mode is enabled by pressing one pedal enable button. One pedal mode has three segments:

This means that if the driver presses the pedal a little bit in the forward normal drive and switch to the one pedal mode, the pedal will be in the region of regenerative braking. This would make the car to start braking suddenly.

To address the problem, we should add a mechanism/algorithm that would let driver to go in the same speed that they were going before they enter one pedal mode.