Add support for Relation type documentation lookups from wikibase (closes #5860)
Add support for Relation type documentation lookups from wikibase
(closes #5860)

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