Contacts : Updated French Translations

(Patch Set 6)

- Better visibility.
- General optimization.
- Fixed MISSPELLING French. (was really long :D)

- Replacement "..." with "\u2026".

- 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>