Bug 26602: [20.05.x] Don't export "actions" column

Bug 26602: [20.05.x] Don't export "actions" column

This patch add the noExport class to all "Actions" columns in the
codebase.
It's a stupid search and replace, maybe the class is added to table
where there is no export button.

Test plan:
Search tables where the export button is available. Confirm that the
"Actions" columns is not exported.
Example: /admin/branches.pl, /admin/cities.pl

Signed-off-by: Sally <sally.healey@cheshiresharedservices.gov.uk>
Signed-off-by: Nick Clemens <nick@bywatersolutions.com>
Bug 26602: (QA follow-up) Cleanup datatables settings

On letter.tt we had nosort and set things via settings that are default in KohaTable so removed
those from letter.js. Also made the last updated column exportable

On upload.tt the noExport didn't do anything, because we couldn't export, so moved to used KohaTable

Signed-off-by: Nick Clemens <nick@bywatersolutions.com>
Bug 26602: Rebase fixes

Signed-off-by: Andrew Fuerste-Henry <andrew@bywatersolutions.com>