Ahh, that's more of a list of past notifications. The most current one appears at the top of the screen (see attached).
Watching following screenshot ( https://www.aeolusproject.org/redmine/attachments/237/03.png) there is only "Delete All" button, so I was just assuming. Havn't noticed any "Dismiss" button and at the top page header I can still see number 6 (I guess number of new notifications).Not sure what you mean by "deleting" - alerts have to be explicitly dismissed by the user, while notices disappear automatically. In either case the notification stays in the db.
One more difference is maybe between dismissing. From Katello's screenshot it looks that you dismiss the notification by deleting it. I would suggest to dismiss item by seeing it and still keep it in the system on notification page.
-- Jarda
-- Jaromír Coufal Interaction Designer Red Hat Czech s.r.o. Mobile: +420 724 595 508 E-mail: jcoufal@redhat.com IRC: jcoufal at #cloudforms-ui, #aeolus, #brno