Jari-Matti provided an updated fi.po in bug 10084, but unfortunately I did not
see that before remerging the strings. Therefore, I did not take the updated
file directly, but downloaded it to /tmp/fi.po and merged the updates with
python ../lyx-2.3-staging/development/tools/mergepo.py -o -l fi -t po /tmp/
The two header changes were done manually. This way, the updated translations
are not hidden in lots of sorting changes. I had to use mergepo.py from 2.3
because the one in master does not treat fuzzy translations correctly.