Merge pull request #923 from Rendalf/IE11-Pointer-Events

IE-11 pointer events

Sortable.js

@@ -72,6 +72,10 @@
 
 		supportDraggable = !!('draggable' in document.createElement('div')),
 		supportCssPointerEvents = (function (el) {
+			// false when IE11
+			if (!!navigator.userAgent.match(/Trident.*rv[ :]?11\./)) {
+				return false;
+			}
 			el = document.createElement('x');
 			el.style.cssText = 'pointer-events:auto';
 			return el.style.pointerEvents === 'auto';