Bug 27893: Optionally skip biblio with open orders in batch delete

Bug 27893: Optionally skip biblio with open orders in batch delete

If the user unchecks the skip checkbox (on by default), we must
make sure that order cancellation is done in background job.

Test plan:
Pick two biblios. One has linked open orders, the other not.
Go to batch delete records. Select 'Enter list of numbers'.
Enter both biblio numbers and check that only one is used on the
follow-up form.
Run the deletion without the skip open orders and verify
that linked order line is cancelled.

Signed-off-by: Marcel de Rooy <m.de.rooy@rijksmuseum.nl>
Signed-off-by: David Nind <david@davidnind.com>
Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>
Signed-off-by: Katrin Fischer <katrin.fischer@bsz-bw.de>