message: ViewManager defect: slice doesn't modify array, use splice instead
diff: @@ -122,7 +122,7 @@ export class ViewManager {
  for (let i = 0; i < vpList.length; ++i) {
  if (vpList[i] === vp) {
  vp.setEventController(undefined);
  - vpList.slice(i, 1);
  + vpList.splice(i, 1);
  didDrop = true;
  break;
  }
  