LP 1816655: Add a patron search button to create booking screen

LP 1816655: Add a patron search button to create booking screen

1) Apply this patch
2) Go to Booking > Create Reservation
3) Choose a resource type
4) Choose a time and double click (or press the Create Reservation
   button)
5) Note that there is now a Search for Patrons button
6) Use this button to search for a patron.
7) Click the select button.
8) Note that the patron's barcode appears in the
Patron Barcode field
9) Click Confirm Reservation
10) Note that the reservation was made.

Signed-off-by: Jane Sandberg <sandbej@linnbenton.edu>
Signed-off-by: Garry Collum <gcollum@gmail.com>