title: Eclipse RCP plugin extentions editor shows generic as the only option
body: <p>Version: Juno Release
  Build id: 20120614-1722
  Got Eclipse RCP Plug-in Developer Resources installed.</p>
  
  <p>Created an Eclipse RCP plugin project. Added org.eclipse.ui.views extention and tried to add a view. Only generic options is available. I guess the schema cannot be found. How can I point to it?</p>
  
  <p>thanks in advance,
  Lukasz</p>