Bug 10612 [Follow-up] Combine and clarify menu items

 Bug 10612 [Follow-up] Combine and clarify menu items

This follow-up patch for Bug 10612 moves all list operations into one
menu while (hopefully) clarifying the labels for each.

Also in this patch: Changed datatables sorting configuration to use the
"nosort" attribute.

To test, apply the patch and go to Tools -> Patron lists.

- On a patron list with no patrons, confirm that the "Actions"
  menu lists "Add patrons," "Edit list," and "Delete list."
- On a patron list containing one or more patrons, confirm that the
  "Actions" menu /also/ has these options: "Print patron cards," "Batch
  edit patrons," and "Batch delete patrons."
- Confirm that the "actions" column is not sortable.
- Test logging in as a user who has various combinations of permission
  to batch edit and batch delete.

Signed-off-by: Nick Clemens <nick@bywatersolutions.com>
Signed-off-by: Katrin Fischer <katrin.fischer.83@web.de>
Signed-off-by: Brendan A Gallagher <brendan@bywatersolutions.com>