Comment 2 for bug 1950826

I have a fix at collab/phasefx/lp1950826-invalidate-email

https://git.evergreen-ils.org/?p=working/Evergreen.git;a=shortlog;h=refs/heads/collab/phasefx/lp1950826-invalidate-email

However, I think it perpetuates another bug where the patron editor doesn't properly handle error conditions (though those are hard to simulate, say, with Operator Change and missing permissions).