Bug 16457: (follow-up) Enable click event on dynamically-created elements

Bug 16457: (follow-up) Enable click event on dynamically-created elements

This patch moves the click handler for patron attribute actions ("new",
"clear") from the links themselves to the container. This allows jQuery
to correctly target dynamically-created copies of the links.

To test you should have extended patron attributes enabled and you
should have some repeatable attributes defined.

 - Create or edit a patron record
 - In the "Additional attributes and identifiers" section, test the
   "Clear" and "New" links. Confirm that the controls work with both the
   original instance of the field and those created by clicking "New."

Signed-off-by: Katrin Fischer <katrin.fischer.83@web.de>
Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>