fix: handleAllRemainingInserts at the very end of an extruder plan (CURA-1568)
fix: handleAllRemainingInserts at the very end of an extruder plan (CURA-1568)

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