Bug 32046: (follow-up) Accommodate the inclusion of item information

Bug 32046: (follow-up) Accommodate the inclusion of item information

If you have item information configured in the MarcItemFieldsToOrder
system preference, the "Select to import" tab will display a basic item
information form which needs to use the same style as other item edit
forms.

In order to make the CSS in addbiblio.css more generic, I've changed
some styles to use a class, .item_edit_form, instead of an ID. This lets
us have multiple <div class="item_edit_form"> in this template without
duplicating IDs. Other instances of <div
id="cataloguing_additem_newitem"> have haa the .item_edit_form class
added.

To test you must have a staged MARC file which includes items and you
must configure the MarcItemFieldsToOrder preference to map those items
in the ordering interface.

As you follow the previous patch's test plan you'll find that when you
click a checkbox or title to expand the information about that title
you'll see "Item record X" headings following by a properly-styled form.

To confirm that the changes to addbiblio.css are not too far-reaching,
test the other affected pages:

 - Item add/edit
 - Batch item modification
 - Batch item deletion

Signed-off-by: Katrin Fischer <katrin.fischer.83@web.de>
Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>
Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>