Move prime tower 1mm down
Move prime tower 1mm down

The combination PC-0.4 and PVA-0.8 wouldn't print because the raft was getting so big that it intersected with the prime tower. Moving the prime tower 1mm down allows us to print again.

Contributes to issue CURA-3650.

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