Update fr.po

French review in progress - last line checked: 1138
Update fr.po

Last checked line 2508
Update fr.po

Last update line 5237
Update fr.po

Final update of the review
Merge pull request #2 from jeromemorignot/Translation-review-french

Update fr.po
Merge pull request #3 from jeromemorignot/master

Additional Pull Request
Merge pull request #133 from muckachina/Updating-French-Desktop

Updating french desktop