Add the jquery-ui.theme.css and update the current one so things are a little bit more pretty.  Use ob_get_clean() instead of flush as the clean flushs and cleans at the same time.

git-svn-id: https://svn.code.sf.net/p/freeghost/code/trunk@2734 71f96598-fa45-0410-b640-bcd6f8691b32