Bug 26273: (follow-up) Format dates and money correctly.

Bug 26273: (follow-up) Format dates and money correctly.

This patch adds the missing formatting for the Datetime and Amount
fields.

Test plan
1/ Apply patch and reload register page to re-display the cashups table
2/ Note that the 'Date' field now displays a nicely formatted date
without an offset.
3/ Note that the 'Amount' field now displays the number according to
your money formatting preferences (with 2 decimal places in most cases)
4/ Signoff

Signed-off-by: Sally <sally.healey@cheshiresharedservices.gov.uk>
Signed-off-by: Katrin Fischer <katrin.fischer.83@web.de>
Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>