Bug 26161: Move actions under rhs fieldsets

Bug 26161: Move actions under rhs fieldsets

This patch moves the action buttons div to within the column div that
contains the 'This sale' and 'Collect payment' fieldsets.

Test plan
1/ Apply patch
2/ Navigate to the 'Point of sale' page (having enabled UseCashRegisters
and EnablePointOfSale)
3/ Confirm the 'Confirm' and 'Cancel' button/link now appear on the
correct side.
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>