Filters URL for the Go to WP Admin button in Main navigation.
Parameters
$link (array) Available options. $link = array( 'url' => $go_back_wpadmin_url, 'text' => __( 'Go to WP Admin', 'mainwp' ), 'tip' => __( 'Click to go back to the site WP Admin area.', 'mainwp' ), );