Fix event listener race condition on login-form

Signed-off-by: Marcel Müller <marcel-mueller@gmx.de>

Author: SystemKeeper

core/js/login/authpicker.js

@@ -10,4 +10,6 @@ jQuery(document).ready(function() {
 		e.preventDefault();
 		document.location.href = e.target.attributes.action.value
 	})
+
+	$('#login-form input').removeAttr('disabled');
 })

core/templates/loginflow/authpicker.php

@@ -47,7 +47,7 @@
 
 	<p id="redirect-link">
 		<form id="login-form" action="<?php p($urlGenerator->linkToRoute('core.ClientFlowLogin.grantPage', ['stateToken' => $_['stateToken'], 'clientIdentifier' => $_['clientIdentifier'], 'oauthState' => $_['oauthState'], 'user' => $_['user'], 'direct' => $_['direct']])) ?>" method="get">
-			<input type="submit" class="login primary icon-confirm-white" value="<?php p($l->t('Log in')) ?>">
+			<input type="submit" class="login primary icon-confirm-white" value="<?php p($l->t('Log in')) ?>" disabled>
 		</form>
 	</p>