French localisation update

Merge

Forgot to add one `fr` to make the French locale (hopefully) work

Forgot to add `fr` here.

Only distribute statuses to followers who signed in in the last 2 weeks, add rake task for clearing feeds of inactive users

Rename media to avoid exposing filename (fixes #207)

then adjust to failure later if the request fails

skip ActionCable for follow/unfollow/block events, instead clear UI from
blocked account's posts instantly if block request succeeds. Add forgotten
i18n for sensitive content

Missing lines in the French translation

 https://mastodon.social/users/Pierrec/updates/100589

e

before loading new one, cache notifications API, fix missing follow button
on public profiles