[TASK] TYPO3 Coding Guidelines - Tabs must be used to indent lines

Change-Id: I56834787f374179cabbb4df7371d6d5dc7a4694c
Resolves: #54655
Reviewed-on: https://review.typo3.org/26583
Reviewed-by: Alex Kellner
Tested-by: Alex Kellner
[TASK] TYPO3 Coding Guidelines - Missing class doc comment

Change-Id: I0487d614979a6166eb3bd76ff55e9c83c5923d14
Resolves: #54653
Reviewed-on: https://review.typo3.org/26582
Reviewed-by: Alex Kellner
Tested-by: Alex Kellner