Bug 20979: Fix confirm deletion popup when deleting a biblio

Bug 20979: Fix confirm deletion popup when deleting a biblio

When deleting an empty bib, error messages pops up "1 order(s) are
using this record. You need order managing permissions to delete this
record." even though user has superlibrarian permissions.  Prevents the
deletion of the bib record.

Signed-off-by: Katrin Fischer <katrin.fischer.83@web.de>
Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>
Signed-off-by: Nick Clemens <nick@bywatersolutions.com>