Bug 35329: Move patron search to modal - routing list

Bug 35329: Move patron search to modal - routing list

The behaviour is a bit different here. Adding a patron from the popup
refreshed the parent page with the newly added patron.

With this patch the refresh of the page will happen when the modal is
closed (if patrons have been added).

Test plan:
Create a subscription, receive one item, create a routing list.
Add users.

Signed-off-by: Owen Leonard <oleonard@myacpl.org>
Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>
Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>