title: re-open background application via notification item
body: <p>I got an app with tabs and a notification bar entry,
  when I send it to background (click on home button)
  and try to re-open the application via click on the 
  notification bar, the app restarts (last selected
  tab is lost).</p>
  
  <p>When I hold the home button if the application is in 
  the background and select it from there or click the
  app's icon on the homescreen, the previous state is
  restored per default (the correct tab is selected)</p>
  
  <p>IMO the intent of the notification is wrong, but I'm
  not sure how to fix it.</p>
  
  <p>In short: How to get a background application back to 
  foreground when I click the notification entry?</p>
  
  <p>thx!</p>