[BUGFIX] Preview information should not conflict with frontend layout

The preview information badge was reworked and now has a fixed
always visible position. Clicks on the preview badge are now prevended
and passed through to the underlaying/covered elements.

Resolves: #83158
Releases: master, 8.7
Change-Id: Ie71420e5185e42b850ac3bb11d8eb4edd26bb4ad
Reviewed-on: https://review.typo3.org/54853


Tested-by: TYPO3com <no-reply@typo3.com>
Reviewed-by: Benni Mack <benni@typo3.org>
Tested-by: Benni Mack <benni@typo3.org>
Reviewed-by: Markus Klein <markus.klein@typo3.org>
Tested-by: Markus Klein <markus.klein@typo3.org>