[feature request] collapsing notification groups
it would be nice to have an option to collapse all notifications from a particular thread, or maybe a particular user as well, into one slot on the side bar etc. that way new activity in those spaces would still be seen, but single threads or people would not be able to "drown out" all a user's other notifications. with the current behaviour it is, to some degree, possible to force a user into paying attention to something by repeatedly pestering them