By moving the only assignment to $scope.catalog_url inside
an if(<url is advanced search>) then only the advanced search
page can load in the opac. By adding a second assignment
inside an else block all opac pages can load again.
Signed-off-by: Jason Boyer <jboyer@library.in.gov> Signed-off-by: Jane Sandberg <sandbej@linnbenton.edu> Signed-off-by: Galen Charlton <gmc@equinoxinitiative.org>