message: Waited for image to load when replacing
  Same changes as for pushing but for replacing
diff: @@ -115,7 +115,12 @@ using namespace facebook::react;
  NVSceneController *controller = [[NVSceneController alloc] initWithScene:scene];
  NSMutableArray *controllers = [NSMutableArray arrayWithArray:_navigationController.viewControllers];
  [controllers replaceObjectAtIndex:crumb withObject:controller];
  - [_navigationController setViewControllers:controllers animated:animate];
  + __block BOOL completed = NO;
  + [self completeNavigation:^{
  + if (completed) return;
  + completed = YES;
  + [self->_navigationController setViewControllers:controllers animated:animate];
  + } waitOn:scene];
  }
  }
  