Enhance the condition required to enable split view

Ajax should be enabled
Pixel to CSS pixel density should be below 1.2, we want to avoid having split view in high density devices

Author: Dragooon

experiments/splitview/jquery.mobile.splitview.js

@@ -5,7 +5,9 @@
     if($.support.touch){
       $('html').addClass('touch');
     }
-    if ($.mobile.media("screen and (min-width:480px)")||($.mobile.browser.ie && $(this).width() >= 480)) {
+    var $query = $.mobile.media('screen and (min-width: 480px)') && ($.mobile.media('(-webkit-max-device-pixel-ratio: 1.2)') || $.mobile.media('max--moz-device-pixel-ratio: 1.2)'));
+    $.support.splitview = ($query || ($.mobile.browser.ie && $(this).width() >= 480)) && $.mobile.ajaxEnabled;
+    if ($.support.splitview) {
       $('html').addClass('splitview');
       //on window.ready() execution:
       $(function() {