Expand documentation of writePark
Expand documentation of writePark

It wasn't clear what retraction limit this function was not adhering to. It is not adhering to the only limit on retraction we currently have: The number of retractions.

Contributes to issue CURA-2795.

ROBO3D/CuraEngine,alephobjects/CuraEngine,ROBO3D/CuraEngine,alephobjects/CuraEngine,ROBO3D/CuraEngine,Ultimaker/CuraEngine,alephobjects/CuraEngine,Ultimaker/CuraEngine