Bug 37129: Patron attributes linked to an authorized value don't show a select menu...

Bug 37129: Patron attributes linked to an authorized value don't show a select menu in batch modification

Test plan:
1. In Administration - Patron attribute types verify you have the default
   SHOW_BCODE using the YES_NO authorized value
2. Tools - Batch patron modification, add a patron card number or
   borrowernumber and continue
3. For Patron attribute select Show barcode on the summary screen item
   listings, and note that you get a blank text input rather than a select
   menu with Yes and No choices
4. Apply patch, restart_all
5. Repeat step 2 and 3, but note that you now get a Yes/No select menu

Signed-off-by: David Nind <david@davidnind.com>
Signed-off-by: Emily Lamancusa <emily.lamancusa@montgomerycountymd.gov>
Signed-off-by: Katrin Fischer <katrin.fischer@bsz-bw.de>