This patch adds the sorting by title string option to the table of
invoices. This allows column data to be sorted based on the
ISO-formatted date rather than the formatted-for-display date. A "blank"
(0000-00-00) date is added to cells which contain no date data.
To test, view the Acquisitions Invoices page (acqui/invoices.pl) and
confirm that the "Billing date" column is sorted correctly regardless of
the dateformat system preference.
Signed-off-by: Srdjan <srdjan@catalyst.net.nz>
Signed-off-by: Katrin Fischer <Katrin.Fischer.83@web.de>
Template only change, passes all tests and QA script.
Sorting of the billing column now works as expected.
Signed-off-by: Galen Charlton <gmc@esilibrary.com>