- fixed integration with User Tags extension (remove some hardcode, changed to hooks);

- fixed 2.0 upgrades for User roles meta data;
- clear/review code;

includes/admin/core/class-admin-metabox.php

@@ -147,13 +147,7 @@ if ( ! class_exists( 'Admin_Metabox' ) ) {
             //restrict content metabox
             $all_taxonomies = get_taxonomies( array( 'public' => true ) );
             $tax_types = um_get_option( 'restricted_access_taxonomy_metabox' );
-            $exclude_taxonomies = array(
-                'nav_menu',
-                'link_category',
-                'post_format',
-                'um_user_tag',
-                'um_hashtag',
-            );
+            $exclude_taxonomies = UM()->excluded_taxonomies();
 
             foreach ( $all_taxonomies as $key => $taxonomy ) {
                 if ( in_array( $key, $exclude_taxonomies ) || empty( $tax_types[$key] ) )