Media “Bulk Restore original images” dosn’t work

Hi,

I found that using the “Bulk Restore original images” action under the Media/Library didn’t have any effect. Looking at the code/documentation I couldn’t find any function linked to this action (please correct me if I missed something).

I didn’t find the code on github so I can’t create a pull request but here is a dirty quick solution for this specific problem.

easy-watermark/src/classes/Watermark/Hooks.php

/**
     * Adds bulk action handling
     *
     * @filter handle_bulk_actions-upload
     *
     * @param string $redirect The redirect URL.
     * @param string $doaction The action being taken.
     * @param array $object_ids The items to take the action on.
     * @return string $redirect
     */
    public function handle_bulk_actions($redirect, $doaction, $object_ids)
    {

        if ( $doaction == 'restore' ) {
            foreach ( $object_ids as $attachment_id ) {
                $meta = get_post_meta( $attachment_id, '_wp_attachment_metadata', true );
                $this->handler->restore_backup( $attachment_id, $meta );
            }
        }

        return $redirect;

    }