Comment 7 for bug 1501217

> Since there might be a little scope for user experience improvement here, I'll leave this open

I absolutely agree, Robie. I already had my finger on the "Invalid" button but I felt just like you that while this is the way it currently is by design, maybe there is still a way to improve user experience. And thus the ticket remained open for further discussion. At the moment, I am not aware of how a potential improvement along the lines suggested here could be done.