Add compatibility with TYPO3 6.1, resolves #48556

git-svn-id: https://svn.typo3.org/TYPO3v4/Extensions/displaycontroller_advanced/trunk@77957 735d13b6-9817-0410-8766-e36946ffe9aa
Add sprite icon for providergroup, resolves #48556

git-svn-id: https://svn.typo3.org/TYPO3v4/Extensions/displaycontroller_advanced/trunk@77960 735d13b6-9817-0410-8766-e36946ffe9aa