[BUGFIX] Make other framesets in BE work again

Similar to ElementBrowser, the other
parts where <frameset> is used don't
work right now. This needs to be fixed.

Resolves: #62834
Related: #62825
Releases: master
Change-Id: Ic7e39bd4e4eb7f8326e4f16b379330aa95081eed
Reviewed-on: http://review.typo3.org/33959
Reviewed-by: Wouter Wolters <typo3@wouterwolters.nl>
Tested-by: Wouter Wolters <typo3@wouterwolters.nl>
Reviewed-by: Frank Nägler <typo3@naegler.net>
Tested-by: Frank Nägler <typo3@naegler.net>