See http://zkfiddle.org/sample/iv1qfn/2-ESC-on-modal-windows

When running this example, click on "Open second modal window". Then click on one table header to sort the column. Now press Escape and both modal windows will be closed.

When pressing escape only the active modal window should be closed. Not both.
It works properly if you don't click initially on the header of the list box.

Greetings Salbader.