LP#1799963 - fix catalog advanced search type default

Since eg.search.adv_pane is now a server stored WS setting
it needed to be fetched with the proper way in order to work.

Signed-off by: Cesar Velez <cesar.velez@equinoxinitiative.org>
Signed-off-by: Angela Kilsdonk <akilsdonk@equinoxinitiative.org>
Signed-off-by: Jane Sandberg <sandbej@linnbenton.edu>
Signed-off-by: Galen Charlton <gmc@equinoxinitiative.org>