[FEATURE] Make new content element wizard tab sort order configurable

It is possible to influence the order of the tabs in the new
content element wizard by setting "before" and "after" values in
Page TSconfig:

    mod.wizards.newContentElement.wizardItems.special.before = common
    mod.wizards.newContentElement.wizardItems.forms.after = common,special

Releases: master
Resolves: #71876
Change-Id: I67ed31535394f16d0437563aa405c6e92a56e0fe
Reviewed-on: https://review.typo3.org/44976


Reviewed-by: Alexander Stehlik <alexander.stehlik@gmail.com>
Tested-by: Alexander Stehlik <alexander.stehlik@gmail.com>
Reviewed-by: Markus Klein <markus.klein@typo3.org>
Tested-by: Markus Klein <markus.klein@typo3.org>