Merge pull request #1125 from camargo/dev

Prefer Polymer first over $ for DOM selection in _clone

Sortable.js

@@ -1421,12 +1421,15 @@
 	}
 
 	function _clone(el) {
-		return $
+		if (Polymer && Polymer.dom) {
-			? $(el).clone(true)[0]
+			return Polymer.dom(el).cloneNode(true);
-			: (Polymer && Polymer.dom
+		}
-				? Polymer.dom(el).cloneNode(true)
+		else if ($) {
-				: el.cloneNode(true)
+			return $(el).clone(true)[0];
-			);
+		}
+		else {
+			return el.cloneNode(true);
+		}
 	}
 
 	function _saveInputCheckedState(root) {