Deny the confirmation when ESC is pressed

[gap777]

By default, some browsers will generate a cancel event when ESC is pressed ; others will ignore it.
Either way, ConfirmationController#deny is not correctly called. The result is that if you

1. click a confirmed action
2. press ESC to dismiss the confirmation modal/dialog
3. click the confirmed action

You should see that the confirmation modal is not presented a second time.

If you attach an event listener on the dialog/modal in which the confirmation is displayed, and handle the cancel event,
you can call deny.