Merge pull request #594 from sulu-cmf/hotfix/sitemap-alternate

Fixed #588 sitemap alternate link bugs
added changelog
added context tags for services
added single copy locale api
added concrete-languages to small response
added overlay to choose action before open ghost
added multiple parameter dest locales for copy
added testcase for multiple locales copy
added multiple locales to api
started with copy from to overlay
added grid to overlay
finished copy from/to overlay
fixed overlay style
fixed contentmapper shadow state
added style and disable current selected locale
added translations
added style to new-overlay
fixed style and added translations
fixed widespace
fixed testcase