To allow tighter cooperation with the printer - after the printer thinks it unloaded the filament from the drive gear,
we'll still rotate the drive gear as long as the MMU reports progress state UnloadingFromFSensor.
After those 40mm of slow unload distance, the MMU checks the fsensor (like is has been doing before).
If FSensor is off at this moment, everything is fine a the unload will continue at full speed.
33edba66ee