title: Use Icon via CSS Class in jQuery Mobile
body: <p>i want to use a icon in jQuery Mobile on a span element...and i want to support retina display too. So how can i use a icon without giving my span a fix width?
  Should i use Media Queries and try to get it working that way or is there any "offical way" to do it?</p>
  
  <p>Regards
  Nils</p>