Bug 26567: (follow-up) Update label and add check for RoutingSerials

Bug 26567: (follow-up) Update label and add check for RoutingSerials

The system preference RoutingSerials controls if the routing list
feature is available in the staff interface or not. If routing lists
are deactivated, the search option should not show.

Also updated the label to read: "Has routing list"

Signed-off-by: Katrin Fischer <katrin.fischer@bsz-bw.de>
Signed-off-by: Marcel de Rooy <m.de.rooy@rijksmuseum.nl>
Signed-off-by: Katrin Fischer <katrin.fischer@bsz-bw.de>