Settings : Updated French Translations

(Patch Set 7)

- Better visibility.
- General optimization.
- Fixed misspelling French.

- Replacement "..." with "\u2026".
- Correction messages like "no translation found".
- Removal of translations that do not translate. (translatable="false")

- Added "msgid" missing.
- Added some missing comments.
- Added several missing translations.
- Added "\u00A0" before and after hyphen.
- Added "\u00A0" before exclamation mark and question mark, then before colon.

- Adapatation compared to the original file.
- Header updated and standardized.
- Other small fixes.

Signed-off-by: Thibault LEMOINE <thibaultblizz@gmail.com>