Fix touch support in color picker

src/utils/ColorPicker.js

@@ -1172,10 +1172,7 @@ export default function($, undefined) {
           return stop();
         }
 
-        var t0 =
+        var t0 = e && e.touches && e.touches[0];
-          e.originalEvent &&
-          e.originalEvent.touches &&
-          e.originalEvent.touches[0];
         var pageX = (t0 && t0.pageX) || e.pageX;
         var pageY = (t0 && t0.pageY) || e.pageY;