Convex hull is also redrawn when machineInstance is changed
Convex hull is also redrawn when machineInstance is changed

CURA-742

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