Comment 3 for bug 2043127

Tested on 3.12 server and everything worked as expected. If a patron's default pickup library was non-visible in the OPAC, the pickup location dropdown defaulted to "Choose a pickup location" and did not allow a hold until a location was chosen. Confirmed this was also the behavior when a patron didn't have a default pickup library set and their home library was non-visible in the OPAC.