message: Removed clear now it's not static
  Don't need to clear the SceneActivity static because it's overwritten ever navigation
diff: @@ -101,12 +101,6 @@ public class NavigationStackView extends ViewGroup {
  onAfterUpdateTransaction();
  }
  - @Override
  - public void onDetachedFromWindow() {
  - scenes.clear();
  - super.onDetachedFromWindow();
  - }
  -
  @Override
  protected void onLayout(boolean changed, int l, int t, int r, int b) {
  }
  