[BUGFIX] Fix SQL error for single table view in list module

This patch fixes wrong field escaping due to simple implode of fields
in case label_alt is set for select or groups fields.

Resolves: #79860
Releases: master
Change-Id: Ie0753957e387c1624824d152ac291524cfd34ccd
Reviewed-on: https://review.typo3.org/51721


Tested-by: TYPO3com <no-reply@typo3.com>
Reviewed-by: Oliver Hader <oliver.hader@typo3.org>
Reviewed-by: Wouter Wolters <typo3@wouterwolters.nl>
Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>
Tested-by: Christian Kuhn <lolli@schwarzbu.ch>
Reviewed-by: Jigal van Hemert <jigal.van.hemert@typo3.org>
Tested-by: Jigal van Hemert <jigal.van.hemert@typo3.org>