title: Sending params in pop/dismiss
body: <p>I've got 3 routes. When I move from 1st to 2nd I need to pass a parameter:
  <code>this.navCtrl.push(ReadyPage, { newGame: true });</code></p>
  
  <p>But I also need to pass sometimes this parameter as well when I moving from 3rd to 2nd.</p>
  
  <p>I'm trying with this but doesn't work:
  <code>this.viewCtrl.dismiss({ newGame: true });</code></p>
  
  <p>Comparing both methods <code>dismiss</code> doesn't seem to have that option (unless it's called <code>data</code> instead <code>params</code>):
  <code>abstract push(page: Page | string, params?: any, opts?: NavOptions, done?: TransitionDoneFn): Promise&lt;any&gt;;</code>
  <code>dismiss(data?: any, role?: string, navOptions?: NavOptions): Promise&lt;any&gt;;</code></p>