Anonymous enrollments aren't prevented by attendee limit

Problem

When an event has an enrollment limit then you can still create anonymous event enrollments once the limit is reached.

Reproduction steps:

• Create a public event that allows AN enrollment with a limit of 2 attendees
• Repeat 3x: Go the the event page as anonymous user and enroll
• The event now has 3 attendees and 0 spots remaining but as an anonymous user you can still sign up

What was expected to happen:

• After the second anonymous enrollment the enroll button should be disabled for new anonymous users like what happens for authenticated users

Solution

T.b.d.