- If no application is selected to open the screenshots, show the save 
      dialog as usual. If an application is selected, save the screenshot in
      /tmp without showing the save dialog, and open it with the application.
      The user will then be able to do what he wants to do with the picture, and
      to save it where he wants using the application.
    - don't leak screenshot_path when GIO is not present on the system.
  * NEWS: updated


(Old svn revision: 5981)