[BUGFIX] Show tooltips in PageTree again

This is a bugfix for a regression introduced by removing ExtJS Quicktips.

Resolves: #68320
Related: #68276
Releases: master
Change-Id: Ie6ea576084edfd729b569ec155d69afffff67a49
Reviewed-on: http://review.typo3.org/41659


Reviewed-by: Jan Helke <typo3@helke.de>
Tested-by: Jan Helke <typo3@helke.de>
Reviewed-by: Susanne Moog <typo3@susannemoog.de>
Tested-by: Susanne Moog <typo3@susannemoog.de>