title: Prerender and prescroll of webview content
body: <p>I have an application using fragments. One of these fragments a WebView which show some locally generated html content. It could have different size but not too large (1-30kb). When user clicks a button on one fragment (let it be FragmentA) i need to change it with that WebView fragment (FragmentB).</p>
  
  <pre><code>How is it going now:
  1. Instaniate FragmentB
  2. replace FragmentA with FragmentB (user sees blank white screen)
  3. FragmentB loads generated html, render it (user sees top of html)
  4. Page scrolls down with webView.pageDown(true) (calling it from opPageFinished()) (user sees scrolling animation to the bottom of the page)
  
  How i want it to be:
  1. Instaniate FragmentB
  2. set it to some invisible container (user still have FragmentA on the screen)
  3. it renders html, scrolls it down (same)
  4. when page is ready, rendered and scrolled down I hide FragmentA and show FragmentB
  </code></pre>
  
  <p>Any suggestions how I can achieve that?
  I tried the second algorithm I described but the problem that it looks like WebView dont want to render and\or scroll content untill the fragment is visible to user.</p>