[BUGFIX] TypoScript-value "sortByColumn" is always ignored

Change-Id: I2b50bd0d014b7bb60d7e880cf73f8391f3644a3c
Resolves: #45852
Releases: master, 2.3
Reviewed-on: http://review.typo3.org/30390
Reviewed-by: Stefan Neufeind <typo3.neufeind@speedpartner.de>
Tested-by: Stephan Vidar <bt3@freakmail.de>
Reviewed-by: Benjamin Mack <benni@typo3.org>
Tested-by: Benjamin Mack <benni@typo3.org>