Add font for extruder name label
Add font for extruder name label

This allows it to get stylised.

Contributes to issue CURA-3161.

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