Bug 12024: fix add to list opening the list adding UI in two windows

Bug 12024: fix add to list opening the list adding UI in two windows

In Item details, when using the menu toolbar for Add To > List,
the list adding UI opens in a popup window, and also in the original
window. The original window should stay showing the item details page.

This patch corrects this behavior, which has been observed in Chromium
on Ubuntu and Chrome on Windows.

Signed-off-by: Bernardo Gonzalez Kriegel <bgkriegel@gmail.com>
Works fixing problem. No koha-qa errors.

Test:
1. On staff, go to detail of some biblio,
click add to List, described behavior

2. With patch applied, original windows stay on item detail

Signed-off-by: Katrin Fischer <Katrin.Fischer.83@web.de>
Patch passes all tests and QA script, works as described.

Signed-off-by: Galen Charlton <gmc@esilibrary.com>