Issue #3490844: Inherit default values of menu_ui

menu_ui_async_widget.module

@@ -273,8 +273,10 @@ function menu_ui_async_widget_form_node_type_form_alter(&$form, FormStateInterfa
     return $menu->label();
   }, Menu::loadMultiple());
   asort($menu_options);
+
   /** @var \Drupal\node\NodeTypeInterface $type */
   $type = $form_state->getFormObject()->getEntity();
+
   $form['menu_async'] = [
     '#type' => 'details',
     '#title' => t('Menu UI Async settings'),
@@ -283,13 +285,19 @@ function menu_ui_async_widget_form_node_type_form_alter(&$form, FormStateInterfa
     ],
     '#group' => 'additional_settings',
   ];
+
+  // Inherit default menus values from default menu settings.
+  $default_menus = $type->getThirdPartySetting('menu_ui', 'available_menus', ['main']);
+  $default_menus_async = $type->getThirdPartySetting('menu_ui_async_widget', 'available_menus', $default_menus);
+
   $form['menu_async']['menu_async_options'] = [
     '#type' => 'checkboxes',
     '#title' => t('Available menus'),
-    '#default_value' => $type->getThirdPartySetting('menu_ui_async_widget', 'available_menus', ['main']),
+    '#default_value' => $default_menus_async,
     '#options' => $menu_options,
     '#description' => t('The menus available to place links in for this content type.'),
   ];
+
   // @todo See if we can avoid pre-loading all options by changing the form or
   //   using a #process callback. https://www.drupal.org/node/2310319
   //   To avoid an 'illegal option' error after saving the form we have to load
@@ -297,14 +305,20 @@ function menu_ui_async_widget_form_node_type_form_alter(&$form, FormStateInterfa
   //   add options to the list using ajax.
   $options_cacheability = new CacheableMetadata();
   $options = $menu_parent_selector->getParentSelectOptions('', NULL, $options_cacheability);
+
+  // Inherit selected parent menu item from default menu settings.
+  $default_menu_item = $type->getThirdPartySetting('menu_ui', 'parent', 'main:');
+  $default_menu_item_async = $type->getThirdPartySetting('menu_ui_async_widget', 'parent', $default_menu_item);
+
   $form['menu_async']['menu_async_parent'] = [
     '#type' => 'select',
     '#title' => t('Default parent link'),
-    '#default_value' => $type->getThirdPartySetting('menu_ui_async_widget', 'parent', 'main:'),
+    '#default_value' => $default_menu_item_async,
     '#options' => $options,
     '#description' => t('Choose the menu link to be the default parent for a new link in the content authoring form.'),
     '#attributes' => ['class' => ['menu-title-select']],
   ];
+
   $options_cacheability->applyTo($form['menu_async']['menu_async_parent']);
 
   $form['#validate'][] = 'menu_ui_async_widget_form_node_type_form_validate';