Add callback to massage CFs on bulk ticket update

In some cases, we might want to remove custom fields from the list of
available custom fields for bulk update. This patch adds a callback to
the Bulk ticket update page.

share/html/Search/Bulk.html

@@ -286,6 +286,9 @@
 $cfs->LimitToGlobal();
 $cfs->LimitToQueue($_) for keys %$seen_queues;
 $cfs->SetContextObject( values %$seen_queues ) if keys %$seen_queues == 1;
+
+$m->callback( %ARGS, CallbackName => 'MassageCustomFields', CustomFields => $cfs,
+SeenQueues => $seen_queues);
 </%perl>
 
 % if ( $cfs->Count ) {