JSON fix: better warning formulas (CURA-905)
JSON fix: better warning formulas (CURA-905)

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