Field_CheckboxList: remove validate and loadPOST
Field_CheckboxList: remove validate and loadPOST

1) validate moved to ValueList
2) loadPOST moved to ValueList
atk4/atk4,samratcis/atk4,atk4/atk4,svisystem/atk4,xepan/atk4,svisystem/atk4,svisystem/atk4,xepan/atk4,samratcis/atk4,xepan/atk4,atk4/atk4,atk4/atk4,samratcis/atk4