[BUGFIX] Make ElementBrowser Trees expand again

Inside the popups the element browser trees don't reload anymore
because the RequireJS calls are added too late.

Resolves: #68012
Releases: master
Change-Id: I492833615d9c16352af667e384de36637fa6ebea
Reviewed-on: http://review.typo3.org/41041


Reviewed-by: Thomas Schlumberger <thomas@b13.de>
Tested-by: Thomas Schlumberger <thomas@b13.de>
Reviewed-by: Wouter Wolters <typo3@wouterwolters.nl>
Reviewed-by: Anja Leichsenring <aleichsenring@ab-softlab.de>
Tested-by: Anja Leichsenring <aleichsenring@ab-softlab.de>