LP#1661688: Add a link and other tweaks to alternate hold pickup feature

LP#1661688: Add a link and other tweaks to alternate hold pickup feature

Adding a couple of tweaks to the alternate hold pickup feature:
  * Created a link for the hold patron so that staff can easily retrieve the record and potentially verify that the user allows the alternate patron to pick
up their holds.
  * Tweaked the language in the event dialog.
  * Removed the new OU setting from actor.org_unit_setting so that a default value is not set.

Signed-off-by: Kathy Lussier <klussier@masslnc.org>
Signed-off-by: Galen Charlton <gmc@equinoxinitiative.org>