[BUGFIX] Show and hide arrow correctly in page tree

This will set the attribute "visibility" to the correct value "visible"
or "hidden" instead of "collapse" so the arrow icon of the page tree
acts accordingly in all browsers.

Resolves: #83585
Releases: master
Change-Id: I17b8705ed9f7e0f0ac966294572ede5c9a151857
Reviewed-on: https://review.typo3.org/55437


Tested-by: TYPO3com <no-reply@typo3.com>
Reviewed-by: Tymoteusz Motylewski <t.motylewski@gmail.com>
Tested-by: Tymoteusz Motylewski <t.motylewski@gmail.com>
Reviewed-by: Andreas Fernandez <a.fernandez@scripting-base.de>
Tested-by: Andreas Fernandez <a.fernandez@scripting-base.de>