Bug 13887: Display the due date as a due date + sort on info

Bug 13887: Display the due date as a due date + sort on info

The due dates should be displayed as due dates :)
i.e not displayed with 23:59

On the way, this patch fixes the sort on the info column.
The column is now sorted using the due dates

Signed-off-by: Jonathan Druart <jonathan.druart@biblibre.com>
Signed-off-by: Nick Clemens <nick@quecheelibrary.org>
Signed-off-by: Katrin Fischer <katrin.fischer.83@web.de>
Signed-off-by: Tomas Cohen Arazi <tomascohen@gmail.com>