Bug 26939: Use AV description in sales table display

Bug 26939: Use AV description in sales table display

Content should use the description rather than the code

Test plan
1/ Enable 'UseCashRegisters'
2/ Make some payments against a cash register
3/ Navigate to the cash register summary page via tools > cashup
registers > register name
4/ Note that the payment type you selected at payment time appears as
the code of the authorized value as aposed to the description.
5/ Apply patch
6/ Refresh page
7/ The payment type should now contain the description

Signed-off-by: David Nind <david@davidnind.com>
Signed-off-by: Josef Moravec <josef.moravec@gmail.com>
Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>