Bug 21984: Pass param_name in pagination URL

Bug 21984: Pass param_name in pagination URL

To test:
 1 - Create a report like:
    SELECT <<cat>>,<<dog>>,<<cat>> FROM items
 2 - Run the report, enter 'CATS' and 'DOGS'
 3 - Get results LIKE "CAT | DOG | CAT"
 4 - Try to go to page 2
 5 - FAIL! (last column is blank)
 6 - Apply patch
 7 - Run the repot, enter 'CATS' and 'DOGS'
 8 - Verify first page looks right
 9 - Go to page 2
10 - Results are correct!

Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>
Signed-off-by: “Lucas Gass” <lucas@bywatersolutions.com>
Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>
Signed-off-by: Nick Clemens <nick@bywatersolutions.com>