Fix flexdelft export

src/main/resources/templates/application/all.html

@@ -144,12 +144,17 @@
                 document.addEventListener("DOMContentLoaded", function () {
                     const updatedSince = $("#export-updated-since");
 
-                    $("#flex-export-form").submit(function () {
-                        setTimeout(function () {
-                            let url = new URL(window.location);
-                            url.searchParams.set("since", moment().format("yyyy-MM-DDTHH:mm:ss"));
-                            window.location = url;
-                        }, 250);
+                    $("#flex-export-form").submit(function (event) {
+                        event.preventDefault();
+                        const program = $("#export-program").val();
+                        const batch = $("#export-batch-number").val();
+                        window.open(
+                            `/application/flex-delft-export?program=${program}&since=${updatedSince.val()}&batch=${batch}`,
+                            "_blank"
+                        );
+                        let url = new URL(window.location);
+                        url.searchParams.set("since", moment().format("yyyy-MM-DDTHH:mm:ss"));
+                        window.location = url;
                     });
                     $("#export-program").change(function () {
                         let url = new URL(window.location);