Fix flexbox containers for checkbox and radio rows (closes #5535)
Fix flexbox containers for checkbox and radio rows
(closes #5535)

morray/iD,openstreetmap/iD,morray/iD,kartta-labs/iD,kartta-labs/iD,ngageoint/hootenanny-ui,openstreetmap/iD,digidem/iD,kartta-labs/iD,ngageoint/hootenanny-ui,ngageoint/hootenanny-ui,AndreasHae/iD,openstreetmap/iD,AndreasHae/iD,digidem/iD,AndreasHae/iD