[BUGFIX] Show new content button for editors in page module again

Editors (group) doesn't see the new content button without page edit
permission in page module. with this bugfix editors can insert new content
again.

Change-Id: Ie8957b3386dfca8a91b7718bedba16af7559b373
Resolves: #76036
Releases: master, 7.6
Reviewed-on: https://review.typo3.org/48057


Reviewed-by: Adrian Mot <adrian.mot@gmail.com>
Tested-by: Adrian Mot <adrian.mot@gmail.com>
Reviewed-by: Gianluigi Martino <gmartino27@gmail.com>
Tested-by: Gianluigi Martino <gmartino27@gmail.com>
Reviewed-by: Markus Klein <markus.klein@typo3.org>
Tested-by: Markus Klein <markus.klein@typo3.org>