Bug 38515: Keep serial notes when generating next serial.

This patch prevents the loss of notes in serials when generating next serial

Test plan:
1 Create a subscription, fill the notes field for the serial with Expected status and activate the system preference PreserveSerialNotes
2 Click Generate next
3 Check that the notes from the now Late serial are gone and that the new serial doesn't have notes.
4 Apply patch, restart services
5 Edit the serial with Expected status to fill the notes field.
6 Click Generate next
7 Check that the notes from the now Late serial are kepts and that they have been copied to the new serial.

Signed-off-by: David Nind <david@davidnind.com>

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

Author: Adolfo Rodríguez

serials/serials-collection.pl

@@ -71,7 +71,7 @@
             my $planneddate = $date_received_today ? dt_from_string : $issue->{planneddate};
             ModSerialStatus( $issue->{serialid}, $issue->{serialseq},
                     $planneddate, $issue->{publisheddate},
-                    $issue->{publisheddatetext}, $status, "", $count_forward );
+                    $issue->{publisheddatetext}, $status, $issue->{notes}, $count_forward );
         } else {
             require C4::Serials::Numberpattern;
             my $subscription = GetSubscription($subscriptionid);