Un-center headings on non-youth homesearch

- created new class for h1s on homesearch_ys
- applied it.

Signed-off-by: William Rockwood <wrockwood@tadl.org>
Make inlib_nav physical_dept-aware

Make the inlib_nav iframe invlude physical_dept-aware. For now, we
use this to let the Kids' Catalog link to the Full Catalog and vice
versa.

Signed-off-by: Jeff Godin <jgodin@tadl.org>