move iOS to the last

Windows Phone 8.1 GDR1, Internet Explorer 11's new User-Agent is
"Mozilla/5.0 (Mobile; Windows Phone 8.1; Android 4.0; ARM; Trident/7.0;
Touch; rv:11.0; IEMobile/11.0; NOKIA; Nokia 920) like iPhone OS 7_0_3
Mac OS X AppleWebKit/537 (KHTML, like Gecko) Mobile Safari/537"