title: How to use "hardcoded" scopes in backend lists
body: <p>I'd like to display a list of records in 2 separate tabs. 
  For example, lets take invoices. In the first tab, there should be records with <code>status="paid"</code> and in the second tab with <code>status="new"</code></p>
  
  <p>I know I can create the tabs in the controllers index view and use different list definitions but I cant figure out how to force a scope on a list definition.</p>
  
  <p>The same thing can be done in the realation config file by using the <code>conditions</code> options</p>