De-clutter top bar

[ThatOneCalculator]

Summary

A new user seeing this:

is pretty confusing, especially since timelines and lists aren't separated anymore. It should be made much clearer, the old separation was all right but many users don't even know how to get to other timelines -- or that they even exist.

[Johann150]

I think we should reintroduce the separation as before. It would be best because it would not confuse previous users.