Update custom background


git-svn-id: https://plugins.svn.wordpress.org/bon-toolkit/trunk@775002 b8457f37-d9ea-0310-8a92-e5e31aec5664
shortcode fixed

git-svn-id: https://plugins.svn.wordpress.org/bon-toolkit/trunk@775003 b8457f37-d9ea-0310-8a92-e5e31aec5664