The list of attendees overflows

[AlbertoPdRF]

Describe the bug

For events with enough attendees, the list of them overflows, causing some of them to not be visible.

To Reproduce

1. Go to an event with enough attendees' page
2. Scroll down to attendees list
3. See error

Expected behavior

All attendees should be visible. This could be accomplished in many ways, so we should discuss which one fits best!

Screenshots