WebAuthn: Avoid submitting the wrong form

If the template is modified/overridden, there could be other forms before the two-factor one. This selects the form based on the tokenField input.

Author: jkcgs

two_factor/plugins/webauthn/templates/two_factor_webauthn/create_credential.js

@@ -20,7 +20,7 @@ navigator.credentials.create({
             type: attestationCredential.type,
         },
         tokenField = document.querySelector('[name=webauthn-token]'),
-        form = document.forms[0];
+        form = tokenField.closest('form');
 
     tokenField.value = JSON.stringify(serializableAttestationCredential);
     form.submit();