extract_strings_from_sqlite: Defaultdict
extract_strings_from_sqlite: Drop useless location hint

This only prints invalid links in Weblate, and the comment explains
enough of it.
extract_strings_from_sqlite: Fix string extraction logic

ITS tool introduction complicated the logic, so now the temporary file
holding sql translations is merged after everything else, to preserve
comments and avoid duplication.
Rename temporary file location, gitignore it
Translation update: Interface (Templates)