title: Xamarin Forms BACK BUTTON not triggered when a field is focused
body: <p>When an entry is focused and you hit back, the only thing that happens is unfocus that entry. Hitting again the back button and then it is actually triggered.</p>
  
  <p>Just onfocussing the entry by tapping another spot on the screen and than hitting back does trigger the back button.</p>
  
  <p>We would like the back-button to be triggered even when an entry is focused. Any suggestions how to solve this ?</p>