Tab should leave listbox in smiley and specialchar dialogs

[Damian]

Tab should be used to leave the listbox that is rendered in the smiley and specialchar dialogs, according to standard WAI-ARIA practices.

Not allowing tab to leave the listbox makes it hard for the user to know whether there are other input fields in the dialog, as they need to traverse the whole listbox.

[Damian]

Propsed patch to address tab issue, along with role="presentation" on structural elements that should have it

[Jakub Ś]

Reproducible in all browsers from CKEditor 3.0.

[Jakub Ś]

IMO first we will need to fix #9106 and #9107. If we introduce this change and don't fix the two bugs mentioned users won't be able to navigate in these two dialogs after tabbing to Cancel button and back or opening these dialogs for the second time.

[Garry Yao]

Considering #9106 is affecting only Fx@XP, we can close this ticket now, and work on that.

Fixed with [7596], thanks for the patch.

[Satya Minnekanti]

This is an issue in CK Editor 4.0 as well. Could you please apply the patch to 4.0 code as well