Improve weekly view in case of many daily events

If there are a lot of all-day / multi-day events these can cause the non all-day events to scroll out of view.

As these "non-all day" events might be more relevant (like "when is my meeting today") than the daily events (usually "Birthday of XY", "XY called in sick", or "Team Z in Meeting all day") give the "all-day" events a max-size to show 5 events, and add a scrollbar if there are more "all day" events.

For the "daily" same as the "weekly" view.