Update French translation (#3117)
* Update French translation
* Apply suggestions from code review
Co-authored-by: Stanislas Signoud <signez@stanisoft.net>
* Update src/locale/locales/fr/messages.po
Co-authored-by: Stanislas Signoud <signez@stanisoft.net>
* Change `étiquette` to `mot-clé`
* Change other usages of `actualité` to `actu`
* Update messages.po
* Change certain space characters to non-breaking spaces
* Update src/locale/locales/fr/messages.po
* Update src/locale/locales/fr/messages.po
Co-authored-by: Stanislas Signoud <signez@stanisoft.net>
* Update messages.po
* Remove superseded strings and match some
* Add new translations
* Update revision date
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Co-authored-by: Stanislas Signoud <signez@stanisoft.net>
authored by surfdude29 Stanislas Signoud and committed by GitHub a02d5f9e 1cefe70e