Only take the active machine if not settable per extruder
Only take the active machine if not settable per extruder

Settable per mesh should only have an effect on the per-object settings. This was misguided of me earlier.

Contributes to issue CURA-2006.

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