make sure preventDefault() is not called on touchend-events per default

* calling `preventDefault()` on touch-events prevents the browser from creating and dispatching the click-event which results in click-listeners of parent dom-nodes not executing even though its expected

Signed-off-by: Clemens Grabmann <clemens.grabmann@cloudflight.io>

src/Stage.ts

@@ -737,7 +737,7 @@ export class Stage extends Container<Layer> {
 
     // always call preventDefault for desktop events because some browsers
     // try to drag and drop the canvas element
-    if (evt.cancelable) {
+    if (evt.cancelable && eventType !== "touch") {
       evt.preventDefault();
     }
   }