make sure that when 2 conflicting names exist the one taken is always the biggest

[12rambau]

following #68

When loading data like mexico you get the department in philipine instead of the country from LATAM.

The database should be reorder to start with the unique country, then unique level 1 etc instead of being grouped by country as it's curently done.
It will create bugs in the name management workaround as the geojson and the table will not be aligned anymore.