[TASK] Add phpDoc in ClickMenu

* Make real booleans
* Adds strict comparison where possible

Resolves: #62460
Releases: master
Change-Id: I5dd88eb2300e86e344cc39972c337685e7b02498
Reviewed-on: http://review.typo3.org/33508
Reviewed-by: Markus Klein <klein.t3@reelworx.at>
Tested-by: Markus Klein <klein.t3@reelworx.at>
Reviewed-by: Georg Ringer <georg.ringer@gmail.com>
Tested-by: Georg Ringer <georg.ringer@gmail.com>