ui: Persist success notification, redirect to list

Tabitha requested that the application returns to the transaction list
after the form was submitted successfully.  Before the navigation
starts, we still want to see the info toast, though.  Since the
navigation may take a few seconds, we keep the toast open indefinitely.

js/transaction.ts

@@ -96,7 +96,13 @@ async function submitForm(data: FormData) {
     btnsubmit.loading = false;
     if (r) {
         if (r.ok) {
-            notify("Successfully updated transaction");
+            notify(
+                "Successfully updated transaction",
+                undefined,
+                undefined,
+                null,
+            );
+            window.location.href = "/transactions";
         } else {
             const html = await r.text();
             if (html) {