The calendar is not initialized when opening and closing the calendar management dialog. Part-of: <https://gitlab.gnome.org/GNOME/gnome-calendar/-/merge_requests/638>
Part-of: <https://gitlab.gnome.org/GNOME/gnome-calendar/-/merge_requests/638>
Part-of: <https://gitlab.gnome.org/GNOME/gnome-calendar/-/merge_requests/632>