It looks like a search bar, and the placeholder text is really hard to see, I just now noticed that there’s dark gray text on top of gray that says I have to enter the instance URL without protocol. But even then, instances such as forum.mycontroller.org, forum.mysensors.org are not found, but they do exist.
It also says “[entered text] was not found!” so it also sounds like it searches. I’m sure I am not the only one really confused by the UX.
Well, but what about configuring how often updates are checked? What about theme override? There’s potentially a lot of things that could be configured just for the client.