Clean up tmx files in weblate

We have lots of memory files in weblate that need to be cleaned up. Many have English terms instead of translations, because of a limitation of some translation files (they cannot provide empty strigs), and so many memories are full of bad translations.

We should clean them up and reupload them, with a healthy translation memory we can improve our consistency and prevent common mistakes from appearing again.

In weblate: https://hosted.weblate.org/memory/project/tor/ the ones that do not say 'rebuild' are backups from transifex that need to be cleaned - maybe unified as well.