For an entity resolved only via cty.dat (e.g. a French call not on QRZ/HamQTH),
the provider block sets a coarse country-centroid grid. The worked-before backfill
now overrides that with the precise locator from the last QSO with this call, and
takes that QSO's lat/lon (derived from the grid when the record stored none) so
the map and saved record stay consistent. A real provider grid still wins.
Moved the (unreleased) worked-before backfill entry into a new 0.21.2 changelog
block, since 0.21.1 is already out.
rouggy
7e08553e6e