Editor: Add 'edit_theme_options' capabilities to wp_navigation post…

… type.

Adds `'edit_theme_options'` capabilities top restrict Navigation permission.

Partial backport from Gutenberg WordPress/gutenberg#37454.

Follow-up to [52069], [52145].

Props spacedmonkey, get_dave, hellofromTonya.
See #54487.

git-svn-id: https://develop.svn.wordpress.org/trunk@52400 602fd350-edb4-49c9-b593-d223f7449a82

src/wp-includes/post.php

@@ -509,6 +509,18 @@ function create_initial_post_types() {
 			'show_in_rest'          => true,
 			'rewrite'               => false,
 			'map_meta_cap'          => true,
+			'capabilities'          => array(
+				'edit_others_posts'      => 'edit_theme_options',
+				'delete_posts'           => 'edit_theme_options',
+				'publish_posts'          => 'edit_theme_options',
+				'create_posts'           => 'edit_theme_options',
+				'read_private_posts'     => 'edit_theme_options',
+				'delete_private_posts'   => 'edit_theme_options',
+				'delete_published_posts' => 'edit_theme_options',
+				'delete_others_posts'    => 'edit_theme_options',
+				'edit_private_posts'     => 'edit_theme_options',
+				'edit_published_posts'   => 'edit_theme_options',
+			),
 			'rest_base'             => 'navigation',
 			'rest_controller_class' => 'WP_REST_Posts_Controller',
 			'supports'              => array(