attempt to remove race condition that makes extruder step a little slower so XY needs to wait
Go back to unequal acceleration/deceleration as there is an occasional pause with it.
Make extruder stop on flush queue once decelerated, if following
forgot to remove motor stop in on_halt, will be doine by flush queue
improve handling of flush queue in extruder
use uint64 for fx counter so minimum speed is now much smaller
fix the tick adjustment for interrupt timer overrun
add a number of motors config setting to set the actual number of motors needed and reduce the hardcoded number from 12 to default of 5 to save memory