title: IntelliJ does not show project folders
body: <p>I have an issue with IntelliJ. It doesn't show any folders in my project view on the left. 
  My setting is "View As: Project"
  How can I manage it so that the folders and packages are shown again?
  I don't have any clue because I didn't change any options!</p>
  
  <p>I'm using IntelliJ 10.0.3. 
  I am working on a Maven Lift Project.</p>