prevent the addition of all effects to Web Clip icons by using "apple-touch-icon-precomposed"

git-svn-id: https://svn.apache.org/repos/asf/flex/site/trunk@1607721 13f79535-47bb-0310-9956-ffa450edef68
apple-touch-icons: white background and slightly increased border for better user (fl)experience :)

git-svn-id: https://svn.apache.org/repos/asf/flex/site/trunk@1607723 13f79535-47bb-0310-9956-ffa450edef68