Steps to Reproduce

1. add 100 events on the same day
2. switch to month view

Current Result

the popup is too high and out of visible range

Expected Result

a shorter height inside the viewport

Debug Information

• the popup is rendered by javascript only. no zul or java API to control it.
• calendar.CalendarsMonth.onMoreClick()

Workaround

.z-calpp-month-cnt

{ max-height: 50vh; overflow: auto }