Add configurable temperature cutoff of motor power

Repair SUPPORT_XCELL_RT support for hardware >= 2.x

The automatic compile test failed.
This puts back the logic that got changed in this commit:

commit faa630d

    Add support for new SEMPU bottom bracket

    with two pas wires (as Thun X-Cell RT)

Repair SUPPORT_XCELL_RT support for hardware >= 2.x

The automatic compile test failed.
This puts back the logic that got changed in this commit:

commit faa630d

    Add support for new SEMPU bottom bracket

    with two pas wires (as Thun X-Cell RT)

Missing directives for Sempu BB

Bugfix Liquid Crystal 4bit Library

Move thermistor to GND

Bugfix SUPPORT_TORQUE_THROTTLE

Make Bafang code compatible to C961

Bugfix BBS PAS without brake sensor

was always braking if no brake was configured

Build test: Add special test for INVERT_BREAK / RESET_PID_ON_BREAK