Bug 25499: Fix fund code column when closing a budget

Bug 25499: Fix fund code column when closing a budget

When closing a budget the fund code column in the table is
always empty. This is due to a TT variable not being correct.

To test:
- Create a budget and fund
- Order anything, leave basket open or not, but don't receive
- Duplicate your existing budget
- Close the first budget in order to move the pending orders
- Verify the fund code is not showing in the table
- Apply patch and reload the patch
- Verify fund codes are now showing correctly

Bonus: Changes the column heading Fund id to Fund ID.

Signed-off-by: Abbey Holt <aholt@dubuque.lib.ia.us>
Signed-off-by: Joonas Kylmälä <joonas.kylmala@helsinki.fi>

Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>