[!!!][TASK] Clean up graphical functions library

Properties which are only accessed inside of
GraphicalFunctions and should remain inside are marked
as protected, are migrated to arrays (to avoid inList calls
instead of in_array()), removed or renamed to remove
classic kasper's-style double negation namings.

Resolves: #82768
Releases: master
Change-Id: If45a9198c3a2979a6fe0a1619a9841bd37a2708e
Reviewed-on: https://review.typo3.org/54318


Tested-by: TYPO3com <no-reply@typo3.com>
Reviewed-by: Susanne Moog <susanne.moog@typo3.org>
Tested-by: Susanne Moog <susanne.moog@typo3.org>
Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>
Tested-by: Christian Kuhn <lolli@schwarzbu.ch>