Update FR locales (#4714)

Update FR locales (#4714)

* Make the fr locales up-to-date with the last changes (new profile view, applications)

* Use the same wording for toots in fr.yml and fr.json

* Translate the pin related strings

* Translate pin-related locales on the front-end

* Add missing locales in doorkeeper.fr.yml and remove un-used ones

* Change "posts" back to "status" in the /about/more page in fr.yml

* Fix typos for "status" in fr.yml

* fix typo for "status" in fr.json

* Remove duplicate string

* Non-breaking space before punctuation

* 'Better' translation for "unpin"

* Put back 'pouet' where it was already

* Fix

* Fix