Footer customization & improvements

Footer customization - Add's possibility to customize your stores footer - Add different content to you footer such as links to your social media, blog, email etc.. Language selection for Rentle Free - Possibility to have one of the 6 languages supported in Admin as your system language in Rentle Free (Czech, English, Estonian, German, Finnish, Spanish) - Default language is defined on signup the same way as the UI-language => coherent experience - Language-settings not behind block anymore, Translations moved under block