3mf files are now placed in their own worldspace
3mf files are now placed in their own worldspace

CURA-382

ynotstartups/Wanhao,Curahelper/Cura,ynotstartups/Wanhao,hmflash/Cura,fieldOfView/Cura,Curahelper/Cura,fieldOfView/Cura,hmflash/Cura