Feature: Filter out prereleases

[reneleonhardt]

GitHub still only labels pre-releases, but if you watch releases you will get them anyway, it's very annoying.
GitLight would be even more usable for me if it would filter out those pre-releases automatically (or by enabling in settings), only showing stable releases.

In addition, GitLight only offers filters on the left sidebar, and no filters in the kanban columns.
So it would make life much easier if those long kanban columns can be filtered too before apply actions like marking unread read (there is only an All action icon, no filters for labels or a free text search field for example).