title: PWA install prompt in ionic
body: <p>Is there any possibility to show "Add To Home Screen" prompt when user visits our application ? Currently, users need to click 3 dot menu button and then "Add to home screen".</p>
  
  <p>Secondly, In iPhone, safari takes the screen shot of the page when we hit "add to home screen" button and use as icon. Can't we use custom icon in iPhone ?</p>
  
  <p>Regards
  T</p>