There is now a feature request for this:
I think the reasoning why its a feature request rather than a bug is that there are now several more of these badges and resolution markers in 1.8. Bit of a stretch if you ask me. The ones from 1.7 no longer have a simple on/off behaviour and resolution information that used to be there so you could at a glance distinguish your versions has gone entirely from several screens. You will find a lot of this is still there if you group your alternative versions. That’s a lot of work though if you haven’t been doing that or you may not even want to as you prefer a different view on your library without your versions hidden.
Looks like another one of these things where it probably makes sense on smaller screens with smaller libraries where you don’t like the clutter. May have just got lost in beta if that was the dominant test case. Hopefully some version of it returns.