Changed name of classic theme from "classic" to "classic_theme"
-Moved styles from admin/pages/sections.php to sections.htt in backend themes (Thanks to Luisehahne)
- Moved javascript files from admin/pages/index.php to external js files (Thanks to Luisehahne)
- Major improovements and changes to all backend files to get more valide Code output (Thanks to Luisehahne)
