Bug 21365: Call BiblioAutoLink from AddBiblio and ModBiblio

Bug 21365: Call BiblioAutoLink from AddBiblio and ModBiblio

This makes e.g. the advanced MARC editor, and anything that uses AddBiblio or
ModBiblio honor BiblioAddsAuthorities.

To test:
1. Make sure BiblioAddsAuthorities and AutoCreateAuthorities preferences are enabled.
2. Add a new record using advanced editor (enable EnableAdvancedCatalogingEditor to
use it), include a previously non-existing author.
3. Save the record and observe the author get an authority number.
4. Add another author, save the record and make sure it also gets an authority number.

Signed-off-by: Michal Denar <black23@gmail.com>
Signed-off-by: Chris Cormack <chrisc@catalyst.net.nz>
Signed-off-by: Nick Clemens <nick@bywatersolutions.com>