[TASK] Replace getSpriteIcon in PageLayoutController

One last occurance in this file.

Releases: master
Resolves: #69735
Change-Id: I9bd2e25bafd0091d0052c59ce4099553013aa724
Reviewed-on: http://review.typo3.org/43243


Reviewed-by: Wouter Wolters <typo3@wouterwolters.nl>
Reviewed-by: Michael Oehlhof <typo3@oehlhof.de>
Tested-by: Michael Oehlhof <typo3@oehlhof.de>
Reviewed-by: Nicole Cordes <typo3@cordes.co>
Tested-by: Nicole Cordes <typo3@cordes.co>