WP Ultimate Post Grid filter to add secondary orderby date when custom meta key is selected as primary order

functions.php

// ORDER GRID BY DATE SECOND IF META KEY ORDER IS ENABLED
//add_filter( 'wpupg_get_posts_args', 'wpupg_order_by_date_second', 10, 2);
add_filter( 'wpupg_query_post_args', 'wpupg_order_by_date_second', 10, 2);
function wpupg_order_by_date_second( $args, $page ){
    if( $args['orderby'] == 'meta_value_num' ){
        $args['orderby'] = 'meta_value_num date';
    }
    return $args;
}

Updated for new version of Post Grid