Fix exist categories (used in chart element) field
Fix exist categories (used in chart element) field

mining/mining,avelino/mining,mlgruby/mining,mlgruby/mining,seagoat/mining,avelino/mining,seagoat/mining,chrisdamba/mining,chrisdamba/mining,mlgruby/mining,AndrzejR/mining,AndrzejR/mining,jgabriellima/mining,jgabriellima/mining,mining/mining