Bug 13601: The fallback regex should contain the time part

Bug 13601: The fallback regex should contain the time part

On displaying a sql date, if the dateformat is not set to sql, the
output should contain the date.
In the previous version, the fallback regex (used for sql format) did not
included the time part (hh:mm:ss).

Checked out an item with due date an ddue time. Time displays as expected.
Signed-off-by: Marc Véron <veron@veron.ch>
Signed-off-by: Katrin Fischer <katrin.fischer.83@web.de>
Signed-off-by: Tomas Cohen Arazi <tomascohen@gmail.com>