ToDo Bar: Disallow deleting read-only events and tasks
The Calendar window List and Month views do not show in the per-event context menu option Delete, when the event’s calendar is read-only. Likewise the Tasks bar does not show in the context menu Delete, when the source is read-only.
The ToDo bar in the Mail window does show Delete for read-only tasks and for read-only events.
Edited by Milan Crha