[BUGFIX] Add missing new_content_element overrides in PageLayoutView

Add the missing override possibilities in PageLayoutView as introduced
by issue #70055. Also add check if the override attribute of
newContentElementWizard is set in the tsConfig array.

Change-Id: Iaa5952c3dedca2b3dfec84e36d55e453e7ad690e
Resolves: #73444
Releases: master, 7.6
Reviewed-on: https://review.typo3.org/46681


Reviewed-by: Wouter Wolters <typo3@wouterwolters.nl>
Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>
Tested-by: Christian Kuhn <lolli@schwarzbu.ch>
Reviewed-by: Frank Naegler <frank.naegler@typo3.org>
Tested-by: Frank Naegler <frank.naegler@typo3.org>