Comment 2 for bug 1879993

This works for me. I tested cases where the user_setting_type had a registration default and where there was no registration default. For both cases, I tested adding a new patron, editing a patron with preferences, and editing a patron without preferences.

My signoff is at:

https://git.evergreen-ils.org/?p=working/Evergreen.git;a=shortlog;h=refs/heads/user/mmorgan/lp1879993_signoff