[FEATURE] Recursiv structure for Xclasses

Resolves: #62092
Change-Id: I93b325a06e011eaa733eac3b5eb49eeaba22cedf
Reviewed-on: http://review.typo3.org/33204
Reviewed-by: Tim Lochmüller <tim@fruit-lab.de>
Tested-by: Tim Lochmüller <tim@fruit-lab.de>