title: avoiding eclipse "changed on file system" dialog?
body: <p>Is there a preference or tweak that will stop Eclipse from putting up a dialog "This file has been changed on the file system." when I switch to Eclipse from another editor?  </p>
  
  <p>Steps:</p>
  
  <ul>
  <li>open eclipse project</li>
  <li>edit some file and save it (page is now 'clean' but has been touched previously)</li>
  <li>switch to other editor</li>
  <li>edit same file</li>
  <li>switch back to eclipse</li>
  <li>see dialog</li>
  </ul>