title: I need a mix between FileDialog and DirectoryDialog
body: <p>If I use the DirectoryDialog , only I can choose one directory.  If I use FileDialog, I can choose multiple files.
  I am looking for a SWT/JFace dialog, who be a mix .</p>
  
  <p>I have found, JFileChooser but is not a SWT component. 
  Any idea?
  Thanks</p>