Style the color picker button to match the new standard button style. Adjust font size and height of 'Default' button to match color picker button. Fixes #26179.
Built from https://develop.svn.wordpress.org/trunk@26385


git-svn-id: http://core.svn.wordpress.org/trunk@26285 1a063a9b-81f0-0310-95a4-ce76da25c4cd