title: iPhone web app startup screen
body: <p>I'm working on an iPhone web app where I'm using the "apple-mobile-web-app-capable" meta tag to get "full screen mode". When I lauch the app it shows a picture of the page where I left of the last time while it loads. It looks like the app is ready to receive input when it is not, and that's confusing. </p>
  
  <p>Is it possible to change the default behaviour and show a blank screen until it is ready to receive input?</p>