Ajout d'une case à cocher pour "visible dans le calendrier graphique" au tableau du lieu de travail.

Many of our workplaces are more of a concept than an actual workplace. They do not have calendars. Like "priority pool" or "Daycare". Each of our schools has a seperate daycare workplace in PAIE, to catagorize the employees, but they are in the same real-world workplace as the elemetary school. Because of this, the list of calendars has two entries for each school.