Bug 37002: Correct several HTML markup errors

Bug 37002: Correct several HTML markup errors

This patch makes several minor corrections to HTML markup in the
bibliographic detail page template and related include files. This
corrects the following validator errors:

- Stray end tag a.
- Bad value true for attribute disabled on element select.
- Bad value true for attribute disabled on element input.
- No space between attributes.
- Duplicate attribute class.
- The value of the for attribute of the label element must be the ID of
  a non-hidden form control.

The patch is simple enough that an inspection of the patch is probably
enough, but following is a detailed test plan of the affected areas:

- Apply the patch and view the bibliographic detail page in the
  staff interface.
- Under the "Edit" menu in the toolbar, these options should still work
  correctly:
  - Modify record using template
  - Edit items in a batch
  - Delete items in a batch
- Click the "Items" link in the sidebar and find the "Bookable" setting
  for the title's items. Make at least one item bookable and return to
  the detail page.
- Click the "Place booking" button in the toolbar and confirm that you
  can successfully place the booking.
- If you have access to Novelist, confirm that Novelist content displays
  correctly on the detail page.
- Turn on the "EnableItemGroups" preference.
- On the detail page, open the "Item groups" tab and click the "New item
  group" button.
  - In the modal, the "Name" and "Display order" labels give focus to
    the corresponding form field when clicked.
  - Create an item group.
- Under the holdings tab, select one or more items and click "Add/move
  to item group".
  - In the modal, clicking the "Item group" label should give focus to
    the dropdown.

Signed-off-by: David Nind <david@davidnind.com>
Signed-off-by: Lucas Gass <lucas@bywatersolutions.com>
Signed-off-by: Katrin Fischer <katrin.fischer@bsz-bw.de>