Ticket #35057: 35057.2.diff

src/wp-admin/includes/screen.php

@@ -57 +57 @@
 
         $hidden = get_user_option( 'manage' . $screen->id . 'columnshidden' );
 
-        if ( ! $hidden ) {
+        $use_defaults = ! is_array( $hidden );
+
+        if ( $use_defaults ) {
                 $hidden = array();
 
                 /**
@@ -75 +77 @@
          * Filter the list of hidden columns.
          *
          * @since 4.4.0
+         * @since 4.4.1         Added the `use_defaults` parameter.
          *
          * @param array     $hidden An array of hidden columns.
          * @param WP_Screen $screen WP_Screen object of the current screen.
+         * @param bool      $use_defaults Whether to show the default columns.
          */
-        return apply_filters( 'hidden_columns', $hidden, $screen );
+        return apply_filters( 'hidden_columns', $hidden, $screen, $use_defaults );
 }
 
 /**