Block Editor: Show privacy help notice on Privacy Policy page.

When editing a page set to be the Privacy Policy page, display a help notice
containing a link to the Privacy Policy guide.

Merges [43920] to trunk.

Fixes #45057.
Built from https://develop.svn.wordpress.org/trunk@44291


git-svn-id: http://core.svn.wordpress.org/trunk@44121 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-admin/includes/admin-filters.php

@@ -146,7 +146,7 @@ add_action( 'wp_privacy_personal_data_erased', '_wp_privacy_send_erasure_fulfill
 add_action( 'admin_init', array( 'WP_Privacy_Policy_Content', 'text_change_check' ), 100 );
 
 // Show a "postbox" with the text suggestions for a privacy policy.
-add_action( 'edit_form_after_title', array( 'WP_Privacy_Policy_Content', 'notice' ) );
+add_action( 'admin_notices', array( 'WP_Privacy_Policy_Content', 'notice' ) );
 
 // Add the suggested policy text from WordPress.
 add_action( 'admin_init', array( 'WP_Privacy_Policy_Content', 'add_suggested_content' ), 1 );

wp-admin/includes/misc.php

@@ -1612,10 +1612,13 @@ final class WP_Privacy_Policy_Content {
 	 * Add a notice with a link to the guide when editing the privacy policy page.
 	 *
 	 * @since 4.9.6
+	 * @since 5.0.0 The $post parameter is now optional.
 	 *
-	 * @param WP_Post $post The currently edited post.
+	 * @param WP_Post|null $post The currently edited post. Default null.
 	 */
-	public static function notice( $post ) {
+	public static function notice( $post = null ) {
+		$post = get_post( $post );
+
 		if ( ! ( $post instanceof WP_Post ) ) {
 			return;
 		}

wp-includes/version.php

@@ -13,7 +13,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '5.1-alpha-44286';
+$wp_version = '5.1-alpha-44291';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.