Fixes#10145
Note: a completely empty birth event is removed by Check and Repair; this is wrong in that sometimes we know a person is born, but not date/place. In Gedcom this is indicated by "1 BIRT Y" lines.
So this PR adds a description to the birth event. This is not an issue for other event types, the C&R tool sees the non-default type and leaves it alone, but birth is the default type.
* Fix Gedcom import/export for more comprehensive mime types
Fixes#11041
* Fix Gedcom import to better find media files
Issue #11041
* Fix Gedcom test files for media mime and error location message