bugfix: retraction extrusion window was interpreted in mm instead of in micron (CURA-414)
bugfix: retraction extrusion window was interpreted in mm instead of in micron (CURA-414)

Ultimaker/CuraEngine,ROBO3D/CuraEngine,alephobjects/CuraEngine,pratikshashroff/pcura,totalretribution/CuraEngine,alephobjects/CuraEngine,pratikshashroff/pcura,alephobjects/CuraEngine,ROBO3D/CuraEngine,Ultimaker/CuraEngine,totalretribution/CuraEngine,pratikshashroff/pcura,totalretribution/CuraEngine,markwal/CuraEngine,ROBO3D/CuraEngine,markwal/CuraEngine,markwal/CuraEngine