Reload globe after dive location was modified

This way a change to the location name is immediately reflected in the
map display.

Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
Show locations with same name on the map if they are more than 50m apart

Not showing them at all was a little too blunt of an instrument. There
likely are dive spots with the same name at different resorts. And even
at the same resort you could have multiple morings for the same dive
site.

Signed-off-by: Dirk Hohndel <dirk@hohndel.org>