Yes, you are right. What is the reason of having this button anyway? `ESC` closed the dialog and I don't think it's too bad indicating that this button won't do anything as long as the input field has the focus. I think, it's even worse once you tab out of the input field and the button get's enabled again. What does this mean in that context? The visual clue would be, now you can close the dialog? But this was possible, before using the mouse. Perhaps we should remove the button completely?