The "No Selected Focus"-button (which I would like to rename, but that's another issue) serves two purposes. One is to show the currently selected focus and the other is to let the user select a particular focus with the help of a context menu.

If you click the button, you can either click with the left button or the right button – the same context menu will be displayed.

But you can context click in most areas in the top of the page to get the same context menu. I think this is wrong, this menu should only be displayed if you click on the button.

Note: If we redesign the button, this bug may be irrelevant.