Fixed stupid mistake with getting active extruder stack
Fixed stupid mistake with getting active extruder stack

CURA-1689

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