Remove Navigation Menus from WP Admin sidebar (#37212)

Removes the 'Navigation Menus' link from the WP Admin sidebar. Instead,
a 'Manage menus' link is added to the dropdown menu in the Navigation
block.

lib/navigation.php

@@ -39,7 +39,7 @@ function gutenberg_register_navigation_post_type() {
 		'has_archive'           => false,
 		// We should disable UI for non-FSE themes.
 		'show_ui'               => gutenberg_is_fse_theme(),
-		'show_in_menu'          => 'themes.php',
+		'show_in_menu'          => false,
 		'show_in_admin_bar'     => false,
 		'show_in_rest'          => true,
 		'map_meta_cap'          => true,

packages/block-library/src/navigation/edit/navigation-menu-selector.js

@@ -5,6 +5,7 @@ import { MenuGroup, MenuItem, MenuItemsChoice } from '@wordpress/components';
 import { useEntityId } from '@wordpress/core-data';
 import { __, sprintf } from '@wordpress/i18n';
 import { decodeEntities } from '@wordpress/html-entities';
+import { addQueryArgs } from '@wordpress/url';
 
 /**
  * Internal dependencies
@@ -45,6 +46,13 @@ export default function NavigationMenuSelector( { onSelect, onCreateNew } ) {
 				<MenuItem onClick={ onCreateNew }>
 					{ __( 'Create new menu' ) }
 				</MenuItem>
+				<MenuItem
+					href={ addQueryArgs( 'edit.php', {
+						post_type: 'wp_navigation',
+					} ) }
+				>
+					{ __( 'Manage menus' ) }
+				</MenuItem>
 			</MenuGroup>
 		</>
 	);