TODO

Advanced:
  Compress file data --compress
  Don't map uid/gid values --numeric-ids
  Copy hardlinks as hardlinks --hard-links
  Protect remote args --protect-args
              ? is this require, as script quotes args?

Extra:
  Execute command before rsync: [......] Halt on failure [x]
  Execute command afger rsync: [.....] On rsync error only [x]

* SessionDialog
  Add NOTES detailing URLs
  Add help text to most pages
  Always select 'Don't delete old increments' if dest is remote.
  Dont allow advanced scheduling if run-as-root
  If run-as-root, then cron scripts need to *not* call su

  Add Adanced settings page:
    Before sync:
    Run: [...................] [F]
    Terminate on failure [x]

    After sync:
    Run on success: [...............] [F]
    Run on failure: [...............] [F]

    Run session with admin privaleges

* Use form-layout, and BuddyLabel's, for al UI???

* Dont create backup folder if there are no changes.