Acq: Several improvements to the LI search interface

Acq: Several improvements to the LI search interface

- You can export a file of ISBN numbers from any interface using an
    LI table.
- You can use multiple search terms in the LI search interface.
- The LI search interface no longer returns too many results in tested cases.
- You can make a brief bib record out of your LI search terms.
- Little bit of misc cleanup.

git-svn-id: svn://svn.open-ils.org/ILS/trunk@15545 dcc99617-32d9-48b4-a31d-7c20da2025e4