title: ionic facebook login on modal window
body: <p>Hello I'm working on a Ionic app, my issue is that login with facebook app does not have a back button, that is not a problem on android because you have the hardware back button, but on IOS there is no way to go back, Is there a way to open this: </p>
  
  <blockquote>
    <p>window.loginFacebook();</p>
  </blockquote>
  
  <p>On a modal window or inside my app? 
  Sorry I'm pretty new to Ionic and really don't have a clue on native apps.
  Thanks.</p>