Bug 32409: Fix cashup searching with non latin-1 chars

This patch fixes a problem with the way queries are passed to the API so
cashups are searchable with non-laint1 chars.

To test:
1. Have two superlibrarian users, one with non-latin1 chars on the name
   (e.g. خمسة)
2. Setup a debit type that can be sold.
3. Use the POS module to have some activity, using both your regular
   user and the other one.
4. Go to the register you used, and choose 'Transaction history'
5. Perform a couple cashups with each user ('Record cashup').
6. Look at the 'Cashup history' table
=> SUCCESS: You see cashups for both users
7. Use the 'Search' filter with latin chars
=> SUCCESS: Your user with only latin1 chars is displayed on the table
8. Repeat, using some non-latin1 char found on the other user
=> FAIL: Table is not refreshed or filtered!
9. Apply this patch
10. Reload the page
11. Repeat 8
=> SUCCESS: Filtering works now!
12. Sign off :-D

Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>

Signed-off-by: David Nind <david@davidnind.com>

Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>
Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>

koha-tmpl/intranet-tmpl/prog/en/modules/pos/register.tt

@@ -438,7 +438,6 @@
             "ajax": {
                 "url": cashups_table_url
             },
-            "header_filter": true,
             "embed": [
                "manager"
             ],