fileman config dialog improvements.
fileman config dialog improvements.

 * comment non-implemented/non-working layout modes.

 * implement check_changed.



git-svn-id: 6ac5796aeae0cef97fb47bcc287d4ce899c6fa6e@40219 7cbeb6ba-43b4-40fd-8cce-4c39aea84d33

jordemort/e17,jordemort/e17,jordemort/e17