Restore fr lu mo addressing 
Restore fr lu mo addressing 

addr:unit is not standard in addressing for France
in France : 800 addr:unit / 4 000 000 addr:housenumber = 0,0002 (0,02%)

This partly reverts https://github.com/openstreetmap/iD/pull/4235/commits/de6b4fb6a20b2a3438b4159192e2b54682fab2e5 in https://github.com/openstreetmap/iD/pull/4235
mapmeld/iD,digidem/iD,kartta-labs/iD,bagage/iD,openstreetmap/iD,bagage/iD,ngageoint/hootenanny-ui,bagage/iD,kartta-labs/iD,kartta-labs/iD,ngageoint/hootenanny-ui,morray/iD,ngageoint/hootenanny-ui,AndreasHae/iD,mapmeld/iD,digidem/iD,morray/iD,AndreasHae/iD,AndreasHae/iD,mapmeld/iD,openstreetmap/iD,openstreetmap/iD