Bug 37979: Toggling Item circulation alerts table cells needs to send csrf_token

When you click on a cell in the Item circulation alerts table, the page sends
a POST to /cgi-bin/koha/admin/item_circulation_alerts.pl without including a
csrf_token, which gets back a 403 error because that's sketchy behavior. It
needs to include the token.

Test plan:
1. Administration - Item circulation alerts
2. Open the browser devtools to the console
3. Click on any green table cell
4. It should have turned red, but instead your console turned red with a 403
5. Apply patch, reload
6. Click on any green table cell, it will turn red

Sponsored-by: Chetco Community Public Library

https://bugs.koha-community.org/show_bug.cgi?id=37959
Signed-off-by: Jan Kissig <jkissig@th-wildau.de>

Signed-off-by: Marcel de Rooy <m.de.rooy@rijksmuseum.nl>
Signed-off-by: Lucas Gass <lucas@bywatersolutions.com>

koha-tmpl/intranet-tmpl/prog/en/modules/admin/item_circulation_alerts.tt

@@ -211,7 +211,7 @@
                         url      : '/cgi-bin/koha/admin/item_circulation_alerts.pl',
                         type     : 'POST',
                         dataType : 'json',
-                        data     : { op: 'cud-toggle', id: id, branch: $branch },
+                        data     : { op: 'cud-toggle', id: id, branch: $branch, csrf_token: $('meta[name="csrf-token"]').attr("content") },
                         success  : function(response){
                             if ($branch == '*' && response.classes.match(/default/)) {
                                 td.html(disabledForAll);