[Tails-l10n] [fr][review] Translations and cleanup

Hi,

please review the following commits in matsa/master:

* 1972e77 - [fr] unfuzz and cleanup
* 41fab3c - [fr] cleaning
* 8acf2e3 - [fr] misc. translation
* d62ffe5 - [fr] correction
* 558cea2 - [fr] mise en page

Thanks & cheers


.