Styling ui-li-icon on enhanced lists only
Styling ui-li-icon on enhanced lists only

Fixes #2771
npmcomponent/cbou-jquery-mobile,arschmitz/jquery-mobile,npmcomponent/cbou-jquery-mobile,startxfr/jquery-mobile,arschmitz/uglymongrel-jquery-mobile,hinaloe/jqm-demo-ja,rwaldron/jquery-mobile,hinaloe/jqm-demo-ja,startxfr/jquery-mobile,rwaldron/jquery-mobile,startxfr/jquery-mobile,arschmitz/uglymongrel-jquery-mobile,arschmitz/uglymongrel-jquery-mobile,arschmitz/jquery-mobile,arschmitz/jquery-mobile,npmcomponent/cbou-jquery-mobile,hinaloe/jqm-demo-ja