Need some kind of loading indicator

[foolip]

The API Catalog view with the default selection of browsers took a few seconds to load after clicking "Expand All". With more browsers one would start to wonder what's happening, so a spinner of some sorts to indicate network activity would be good. And stop it if the fetch fails :)

[mdittmer]

I don't think this issue is related to clicking "Expand All", but rather, just the load time. Right now we have a (mostly correct) progress bar at the top of the table view, but it's rather subtle. We can add a toast after a timeout (at least, for now) and further investigate how to optimize first load time.

[foolip]

Yep, I was confused by the fact that I've always clicked "Expand All" without waiting for the load.

As discussed on chat, what we should have is probably a toast that shows up after 3 seconds of waiting that says "Still working, see issue bla for why it can be slow"