Bug 26162: [19.11] Fix DT info label

Bug 26162: [19.11] Fix DT info label

There is an inconsistency in 19.11:
% grep Showing koha-tmpl/intranet-tmpl/prog/en/includes/datatables.inc koha-tmpl/intranet-tmpl/prog/js/datatables.js
koha-tmpl/intranet-tmpl/prog/en/includes/datatables.inc:    var MSG_DT_INFO = _("Showing _START_ to _END_ of _TOTAL_");
koha-tmpl/intranet-tmpl/prog/js/datatables.js:        "sInfo"             : window.MSG_DT_INFO || "Showing _START_ to _END_ of _TOTAL_ entries",

The "entries" is not always displayed.

datatables.inc has been removed from 20.05 by
Bug 24662: Remove global variables MSG_* from datatables.inc

Signed-off-by: Aleisha Amohia <aleishaamohia@hotmail.com>
(cherry picked from commit 8d1e45727b16ca63e0c0041fcba4e10222665987)
Signed-off-by: Victor Grousset/tuxayo <victor@tuxayo.net>