title: Prism.Forms : How to dispose the page that has been navigated from?
body: <p>[Xamarin.Forms]</p>
  
  <p>I have a case where I am on the sign in page and after the user press sign in button I use the navigation service to go to the MainPage. The problem is that "LoginPage" is still active and receives and interacts with events, such as the login button would be pressed if I press "Enter" from the keyboard or the remove control . 
  So is there a way to get rid of the "LoginPage" so it does not listen to  keyboard events (provided by default in Android) . 
  Otherwise , is there a way to dispose the "LoginPage" After I navigate from it ? </p>