Bug 28835: Fix ability to pass list contents to batch record modification

Bug 28835: Fix ability to pass list contents to batch record modification

Bug 12759 added the ability to pass list contents to batch record
modification/deletion tools.
Patch Bug 22417 [Restore the 'add to list' feature] removed the fetch
of lists in batch_record_modification.pl I don't understand why.
It still exists in batch_delete_records.pl.

Note that this is needed when first form is displayed.

Test plan :
1) Create a private and a public list of records
2) Open Tools > Batch record modification
3) Check you can use the lists
4) Open Tools > Batch record deletion
5) Check you can use the lists

Signed-off-by: Lucas Gass <lucas@bywatersolutions.com>
Signed-off-by: Katrin Fischer <katrin.fischer.83@web.de>
Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>