Add French screenshots in the French version of usermanual (till 3.4.2.2)
*.png et *_fr.png = French version
*_en.png = English version
Merge branch 'master' of https://github.com/darktable-org/darktable
add file *_en.png and *_fr.png
Delete all French screenshots named *_fr.png in the usermanual. French screenshots are named *png.
French screenshots are introduced till effects group (not included)
Add French screenshots in Chapters 1, 2 and 3
Add all the frecnh screenshots in the usermanual
Merge branch 'master' of https://github.com/darktable-org/darktable
Update French usermanual
Merge branch 'master' of https://github.com/darktable-org/darktable
Update French usermanual after a git pull upstream master
Merge branch 'master' of https://github.com/darktable-org/darktable
Update French translation of the usermanual after a git pull upstream master
Update usermanual after git pull upstreram master
Change some images after a few further fixes for #10175
Add French screenshots for defringe, rotate pixels an scaling pixels
Merge branch 'master' of https://github.com/darktable-org/darktable
Merge branch 'master' of https://github.com/darktable-org/darktable
Update French translation of the usermanual after git pull upstream master
Delete all French screenshots in the user manual
Minor update of the French translation of the user manual