[TASK] Sync CMS Fluid with Flow Fluid 1.1 (part1)

This is the first part of a backport fluid from Flow.
It contains small changes, mostly CGL related.

Change-Id: I72ccac5427638f8525e6b9c754dc5eafb5095dc1
Releases: 6.1
Resolves: #44819
Reviewed-on: https://review.typo3.org/17725
Reviewed-by: Wouter Wolters
Tested-by: Wouter Wolters
Reviewed-by: Marc Bastian Heinrichs
Tested-by: Marc Bastian Heinrichs