when migrating trees, use the right gedcom file
when migrating trees, use the right gedcom file

seems like there are two pointer in each tree row: GenTreeFileId and
GenTreePath. Sometimes the first points to the latest file and sometimes
the latter. This fix checks the files creation date and uses the latest.

Beit-Hatfutsot/dbs-back,Beit-Hatfutsot/dbs-back,Beit-Hatfutsot/dbs-back,Beit-Hatfutsot/dbs-back