Bug 12759: Use a list (shelf) for batch record modification and deletion

Bug 12759: Use a list (shelf) for batch record modification and deletion

To test:
1) Create a list, add a record to it by its barcode that you don't mind
deleting
2) Go to Tools -> Batch record modification
3) Select the record type 'Authorities'. Confirm the dropdown to select
a list disappears. Confirm selecting 'Biblios' makes the dropdown show
again.
4) Select the list from the dropdown, select a modification template,
Continue
5) Confirm all of the records in that list show on the page. Click
Modify selected records. Confirm this is successful.
6) Go to Batch record deletion
7) Select the record type 'Authorities'. Confirm the dropdown to select
a list disappears. Confirm selecting 'Biblios' makes the dropdown
show again.
8) Select the list from the dropdown and click Continue
9) Confirm all of the records in that list show on the page. Click
Delete selected records. Confirm this is successful.
10) Go back to your lists. The list should still exist but it will now be
empty.

Sponsored-by: Catalyst IT
NOTE: Rebased to work -- Mark Tompsett
Signed-off-by: Charles Farmer <charles.farmer@inLibro.com>
Signed-off-by: Katrin Fischer <katrin.fischer.83@web.de>
Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>

Signed-off-by: Nick Clemens <nick@bywatersolutions.com>