Replace use of Set object in validator
Replace use of Set object in validator

openstreetmap/iD,openstreetmap/iD,AndreasHae/iD,morray/iD,kartta-labs/iD,morray/iD,digidem/iD,digidem/iD,kartta-labs/iD,AndreasHae/iD,openstreetmap/iD,AndreasHae/iD,kartta-labs/iD