datepickers weeks start on monday, not sunday
Created by: adipasquale
https://trello.com/c/Y4yDu6Kz/1010-forcer-premier-jour-a-lundi-dans-les-datepickers
Created by: adipasquale
https://trello.com/c/Y4yDu6Kz/1010-forcer-premier-jour-a-lundi-dans-les-datepickers