Menus: Test creating parent after a child doesn't throw an error.

As menus are re-arranged, it's possible a menu item was created prior to its parent.

This introduces a test to ensure the order in which menu items are created relevant to their parents does not trigger errors.

Props costdev, peterwilsoncc.
Fixes #57122.


Built from https://develop.svn.wordpress.org/trunk@55328


git-svn-id: http://core.svn.wordpress.org/trunk@54861 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-includes/version.php

@@ -16,7 +16,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '6.2-beta1-55327';
+$wp_version = '6.2-beta1-55328';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.