Bug 18904: Advanced editor - Rancor - Add authority support

Bug 18904: Advanced editor - Rancor - Add authority support

This patchset adds the ability to use the authorities search to select
or clear fields in the advanced editor

To test:
 1 - Open a record in the advanced cataloging editor
 2 - Press 'Ctrl+L' while in a field that shuold not be linked to
authorities (300 for instance)
 3 - Nothing should happen
 4 - Try it in a field that should be linked
 5 - You should get the authorities pop-up
 6 - Values in pop-up should be populated from values in record (as
        appropriate for authority type)
 7 - Correct authority type should be selected ( PERSO_NAME for 100,
        TOPIC_TERM for 650, etc.)
 8 - Press 'Clear', field should be blanked
 9 - Search again and select an authority
10 - Field should be correctly populated

Signed-off-by: Katrin Fischer <katrin.fischer.83@web.de>
Signed-off-by: Marcel de Rooy <m.de.rooy@rijksmuseum.nl>
Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>