[TASK] Handle pageTs for FormEngine in only one result array key, not two

PageTsConfig settings are stored, processed and read from the same array
key in the result array now, no longer two. The split turned out to be
not neccessary, so it was dropped.

Change-Id: Iac284df60d739ec80d9a7f46d4b93b455274f740
Resolves: #70554
Releases: master
Reviewed-on: http://review.typo3.org/43948


Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>
Tested-by: Christian Kuhn <lolli@schwarzbu.ch>
Reviewed-by: Wouter Wolters <typo3@wouterwolters.nl>
Tested-by: Wouter Wolters <typo3@wouterwolters.nl>