[TASK] Cleanup wizard initializing

The patch cleans up the initialization of the various
wizards we have in TYPO3 CMS. Things that are improved:

* Add constructor to all controllers
* Move language inclusion to constructor
* Move init() and sometimes printContent() to the constructor
* Make init() protected
* Add controller to $GLOBALS['SOBE']

Change-Id: I9783e347a3bf983fae8b6bbbbc972ecf56f31f83
Resolves: #48963
Releases: 6.2
Reviewed-on: https://review.typo3.org/21293
Reviewed-by: Christian Kuhn
Tested-by: Christian Kuhn
Reviewed-by: Anja Leichsenring
Tested-by: Anja Leichsenring