Create and edit... authority record now gets $0 control subfield auto-applied

Create and edit... authority record now gets $0 control subfield auto-applied

Following on r17857, when you create an authority record in the flow using
the "Create and edit..." option, a $0 control subfield will automatically
be appended to the target field once "Save Record" is clicked on the authority
record editor pane. Non-savers of the bib record beware! Also subject to
interesting effects of the bib editor tab gets destroyed before the auth
record is created via the Save Record button.

git-svn-id: svn://svn.open-ils.org/ILS/trunk@17858 dcc99617-32d9-48b4-a31d-7c20da2025e4