If there is a default color registered, show a 'Default' action rather than a 'Clear' action, as clearing the value would simply return to the default.
Make current_theme_supports() accept a second argument for 'custom-background' requests, the same as get_theme_support(). Missed in earlier changes, see #20249.
fixes#20734, fixes#18041.
git-svn-id: http://core.svn.wordpress.org/trunk@20901 1a063a9b-81f0-0310-95a4-ce76da25c4cd