Description of problem:
User cannot unregister (Remove registration) from events.

Version-Release number of selected component (if applicable):


How reproducible:
always

Steps to Reproduce:
1.Users tab in webadmin
2.Stand on user
3.Event notifier sub tab
4.Click on "manage events"
5.Select some events (or events categories) and click OK
6.You will be registered to some events - they will be displayed.
7.Click again on "manage events".
8.Uncheck checkboxes in order to unregister.
9.Click OK

Actual results:

10.Events being displayed as if user is still registered to them.
(refresh doesn't remove them either)


Expected results:
User is able to unregister, those events are removed from the list of registered events.

Additional info: