Use recent-export-dir as default for Export View
instead of the console default directory, which can be where
program resides (on Windows), or other inappropriate place.
Use USER_HOME for default directory on 'Export' (recent-export-dir)
if first run (default settings) rather than default directory, which
can be where program resides (on Windows), or other inappropriate
place.
Use USER_HOME for default directory on 'Import' (recent-import-dir)
if first run (default settings) rather than recent file which is
generally set to the grampsdb path.
Fixes#10802
c110d9bc23