Add definition for BQ Witbox
Add definition for BQ Witbox

Contributes to issue CURA-1278.

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