title: IntelliJ IDEA 14 can't drag files to other packages
body: <p>Until today, in the Project view of IntelliJ IDEA 14, I could drag files from one package to another. Now I cannot.</p>
  
  <p>I've confirmed that I can drag and drop outside of IntelliJ and can re-order tabs in IntelliJ, so it's not a hardware issue. Is there a setting that governs this?</p>
  
  <p>Right now my workaround is F6 (Refactor -> Move) and manually specifying the destination.</p>