message: Simplified scenes state creation
diff: @@ -23,11 +23,8 @@ class NavigationMotion extends React.Component<NavigationMotionProps, Navigation
  delete this.sharedElements[scene][name];
  },
  }
  - var scenes = {};
  var {state, crumbs} = this.props.stateNavigator.stateContext;
  - if (state)
  - scenes[crumbs.length] = true;
  - this.state = {scenes, rest: false};
  + this.state = {scenes: {[crumbs.length]: !!state}, rest: false};
  }
  static defaultProps = {
  duration: 300
  