Bug 27795: Misalignment of TOTAL value in lateorders page

Bug 27795: Misalignment of TOTAL value in lateorders page

This patch corrects the colspan in the footer of the late orders page.

It also adds a quantity total cell to the footer and changes the
container of the buttons at the bottom of the page from a <p> tag to
the standard <fieldset class="action">.

To test, apply the patch and go to Acquisitions -> Late orders.

In the footer of the late orders page, there should be a total under the
"Quantity" column. The total cost number should be correctly aligned
under the "total cost" header cell.

Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>
Signed-off-by: Katrin Fischer <katrin.fischer.83@web.de>
Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>