[TASK] General cleanup


git-svn-id: https://svn.typo3.org/TYPO3v4/Extensions/df_tabs/trunk@76503 735d13b6-9817-0410-8766-e36946ffe9aa
[FEATURE] Compatibility with 6.0/6.1

Resolves: #46015


git-svn-id: https://svn.typo3.org/TYPO3v4/Extensions/df_tabs/trunk@76504 735d13b6-9817-0410-8766-e36946ffe9aa