Stall Guard Recovery, Explicitly Return to Position

[AbeFM]

Version 9.9.0-136 (I think)

When stall guard triggers, the head is left in the #1 position (as if freshly homed), but the printer thinks it is at the position it was attempting to travel to when the stall was detected.

Either the head should be moved to match the MMU's theoretical position, or the MMU should have its registers set to tell it that it has been homed.