Improve temporal awareness for large events #1619
Description
As a user, when viewing an event with a lot of shifts, it can be hard to get an understanding of the temporal dimension of the event.
E.g. there is no hint about days (expect for the actual dates), so it is not intuitive how many days the event spans or how many shifts there are per day.
ephios users reported that their volunteers sometimes miss shifts when there are multiple in overlapping times.
We should discuss this. One first idea was making use of another visualisation for the event detail page, e.g. similar to the calendar day view.