I admit defeat on closing the interface, you indeed did it, however, I think I should be able to duplicate your action. I'm at exactly the same point on this account, and there aren't that many options on tutorial island.
The point is you can't PROVE it won't pop up again, LOL. What if you took that screenshot inbetween popups? Or what if you just did the tutorial normally without the interface?
It's just another method of doing it. The popup interface can be used. You still need to play around with a familiar I believe, so there are other ways without this interface.
~ I really don't know if it will work though, its just a theory and its not really my idea.
I started the game in resizeable mode and from there you can click on certain interactive objects and the design interface will disappear for a moment. Another way to make it disappear briefly is by clicking the run "globe" near the minimap.
I can't find any use for it since it only comes up when you login and once it disappears it doesn't pop back again. If you died on tutorial island, thereby tricking the game into thinking you were still in the tutorial, you could probably use it far more effectively. I'm not sure but I think this interface can delay certain actions so it might be possible to combine this interface with the lighting fires glitch to die to the rats. Just a thought.
There is things you can do with this you just don't see it, better than dieing on tut.