LP#1792484 Patron preferred name in hold shelf dialog

LP#1792484 Patron preferred name in hold shelf dialog

Display the patron preferred name in addition to the primary name in the
route-to-holds-shelf dialog.  As with primary name, preferred name is
hidden when an alias is applied.

To test
[1] Add a primary first, middle, and/or last name value to a patron.
[2] Place a hold for the patron with the pickup library matching the
    login library.
[2] Capgture the hold via the Checkin interface (instead of the hold
    capture interface) and note the preferred name display.

Signed-off-by: Bill Erickson <berickxx@gmail.com>