In details I would like to be able to have a calendar which ownershop is shared by all members of a group so that not only it is available to all members of this group but also is manageable by all members of the group and alive as long as the group exist.
With the current feature (creating a calendar and then sharing it with a group) not only the URL refers to the creator login but I am afraid that when the user is removed the calendar is also removed.