Bug 21399: Sort patron fines in OPAC by date descending as a default

Bug 21399: Sort patron fines in OPAC by date descending as a default

This patch modifies the DataTables configuration of the logged-in user's
"Fines and charges" table in the OPAC so that the table is sorted by
date, descending.

To test, apply the patch and log in to the OPAC as a user with multiple
fines. Go to the "your fines" page and confirm that the table is sorted
by default on the first column with the newest entries first.

Signed-off-by: Nazlı Çetin <nazli@devinim.com.tr>
Signed-off-by: Katrin Fischer <katrin.fischer.83@web.de>
Signed-off-by: Nick Clemens <nick@bywatersolutions.com>