[BUGFIX] Fix multi-checkbox/radiobox labels for values containing dots

If checkbox/radiobox values contain dots, these are falsely evaluated as
array lookup paths. Fix this by passing in separate path segments instead
which may contain dots.

Resolves: #82210
Releases: master, 8.7
Change-Id: Ib3d0d1abbeb4fdf84da427f6bea0d597ba9aade6
Reviewed-on: https://review.typo3.org/54007


Reviewed-by: Daniel Lorenz <daniel.lorenz@extco.de>
Tested-by: Daniel Lorenz <daniel.lorenz@extco.de>
Tested-by: TYPO3com <no-reply@typo3.com>
Reviewed-by: Stefan Neufeind <typo3.neufeind@speedpartner.de>
Tested-by: Stefan Neufeind <typo3.neufeind@speedpartner.de>