Fix focus issue in IE when selecting message row (#1488620)

CHANGELOG

@@ -1,6 +1,7 @@
 CHANGELOG Roundcube Webmail
 ===========================
 
+- Fix focus issue in IE when selecting message row (#1488620)
 - Remove (too big) min-width on mail screen
 - Add full headers view in message preview window (#1488538)
 - Fix message display page issues - unified with message preview (#1488590, #1488642)

program/js/list.js

@@ -231,8 +231,8 @@ focus: function(e)
     }
   }
 
-  // Un-focus already focused elements
-  $(document.activeElement).blur();
+  // Un-focus already focused elements (#1487123, #1487316, #1488600, #1488620)
+  $(':focus:not(body)').blur();
   $('iframe').each(function() { this.blur(); });
 
   if (e || (e = window.event))