Groups of contests

[Former user]

It would be cool if contests were pre-categorized (Mostly by site probably,) to something like

Personal contests (may be further divided to onlite/with onsite) IOI preparation contests ML contests Marathons 24h-style contests (+ elimiations)

So that one can choose groups of contests which he is interested in

Currently one need to configure list of sites manually which fails when new sites are added. + one may miss qual because its filtered while main competition is not (by time for example)