Bug 27982: Replace obsolete title-string sorting: Acquisitions templates part 1

Bug 27982: Replace obsolete title-string sorting: Acquisitions templates part 1

This patch modifies several acquisitions templates to replace the use of
the "title-string" DataTables sorting method with the newer "data-order"
attribute.

To test, apply the patch and view the following pages to confirm that
columns containing dates sort correctly when using any setting of the
"dateformat" system preference:

- Acquisitions -> Vendor search
- Acquisitions -> Vendor -> Basket -> Add to basket
   -> From a staged file
   -> From existing orders (copy)
- Acquisitions -> EDIFACT messages
- Acquisitions -> Order search
- With AcqEnableFiles enabled, attach some files to an invoice:
  - Acquisitions -> Invoices
    Acquisitions -> Invoices -> Manage invoice files

Signed-off-by: Amit Gupta <amit.gupta@informaticsglobal.com>
Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>
Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>