Disable Undo/Redo when map is not editable (closes #4358)
Disable Undo/Redo when map is not editable
(closes #4358)

1ec5/iD,AndreasHae/iD,ngageoint/hootenanny-ui,digidem/iD,AndreasHae/iD,1ec5/iD,bagage/iD,openstreetmap/iD,morray/iD,AndreasHae/iD,mapmeld/iD,bagage/iD,morray/iD,ngageoint/hootenanny-ui,openstreetmap/iD,kartta-labs/iD,mapmeld/iD,bagage/iD,openstreetmap/iD,kartta-labs/iD,digidem/iD,1ec5/iD,ngageoint/hootenanny-ui,kartta-labs/iD,mapmeld/iD