fix: prime tower thickness has rounding (CURA-3180)
fix: prime tower thickness has rounding (CURA-3180)

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