Add a method to clear all the meeting of a calendar in the model
Expose in the internal API the method to clear all the meetings of a calendar
Add the confirmation form for clearing a calendar of all its meetings
Clear the delete_calendar form from field that no longer exists
Admins are calendar_admin and the agenda and agenda_list needs to know calendar_admin
Add the clear_agenda template
Add method to clear an agenda of all its meetings
If the user is a calendar_admin he/she is allowed to clear the agenda of all its meetings
Have the Calendar object have an idea of the meetings associated with it
Display when clearing or deleting a calendar how many meetings are associated with the calendar