diff -u b/core/lib/Drupal/Core/Render/Element/StatusMessages.php b/core/lib/Drupal/Core/Render/Element/StatusMessages.php
--- b/core/lib/Drupal/Core/Render/Element/StatusMessages.php
+++ b/core/lib/Drupal/Core/Render/Element/StatusMessages.php
@@ -73,7 +73,7 @@
    *
    * @see drupal_get_messages()
    */
-  public static function renderMessages($type) {
+  public static function renderMessages($type = NULL) {
     $render = [];
     if (isset($type)) {
       $messages = \Drupal::messenger()->deleteByType($type);
reverted:
--- b/core/modules/menu_ui/src/MenuForm.php
+++ a/core/modules/menu_ui/src/MenuForm.php
@@ -240,10 +240,6 @@
           'data' => $this->t('Enabled'),
           'class' => ['checkbox'],
         ],
-        [
-          'data' => $this->t('Expanded'),
-          'class' => ['checkbox', 'priority-medium'],
-        ],
         $this->t('Weight'),
         [
           'data' => $this->t('Operations'),
@@ -302,19 +298,8 @@
           ],
           $element['title'],
         ];
-
         $form['links'][$id]['enabled'] = $element['enabled'];
+        $form['links'][$id]['enabled']['#wrapper_attributes']['class'] = ['checkbox', 'menu-enabled'];
-        $form['links'][$id]['enabled']['#wrapper_attributes']['class'] = [
-          'checkbox',
-          'menu-enabled',
-        ];
-
-        $form['links'][$id]['expanded'] = $element['expanded'];
-        $form['links'][$id]['expanded']['#wrapper_attributes']['class'] = [
-          'checkbox',
-          'menu-expanded',
-          'priority-medium',
-        ];
 
         $form['links'][$id]['weight'] = $element['weight'];
 
@@ -376,12 +361,6 @@
           '#title_display' => 'invisible',
           '#default_value' => $link->isEnabled(),
         ];
-        $form[$id]['expanded'] = [
-          '#type' => 'checkbox',
-          '#title' => $this->t('Show @title as expanded', ['@title' => $link->getTitle()]),
-          '#title_display' => 'invisible',
-          '#default_value' => $link->isExpanded(),
-        ];
         $form[$id]['weight'] = [
           '#type' => 'weight',
           '#delta' => $delta,
@@ -476,7 +455,7 @@
     // Update our original form with the new order.
     $form = array_intersect_key(array_merge($order, $form), $form);
 
+    $fields = ['weight', 'parent', 'enabled'];
-    $fields = ['weight', 'parent', 'enabled', 'expanded'];
     $form_links = $form['links'];
     foreach (Element::children($form_links) as $id) {
       if (isset($form_links[$id]['#item'])) {