Fix bug where issues would not be properly centered if the map was not already at z19 (close #6384)
Fix bug where issues would not be properly centered if the map was not already at z19 (close #6384)

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