Bug 9044: Provide item selection in record detail page (staff client)

Bug 9044: Provide item selection in record detail page (staff client)

This patch add a column in the items table of catalogue/detail.pl that
contains checkboxes for item selection and a drop-down list of actions
that can be executed for the selection of items.

Currently available actions are:
- Delete selected items: redirect to batch items deletion
- Modify selected items: redirect to batch items modification

Item selection is only enabled if the new syspref
StaffDetailItemSelection is ON.
Actions are not displayed if user doesn't have the right permissions.

Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>
Signed-off-by: Bernardo Gonzalez Kriegel <bgkriegel@gmail.com>
Signed-off-by: Katrin Fischer <Katrin.Fischer.83@web.de>
Passes all tests and QA script.
Further testing notes on last patch.

Signed-off-by: Galen Charlton <gmc@esilibrary.com>