[BUGFIX] CSV rendering in CType table not properly done

The CSV rendering in CType table is not done properly in
css_styled_content method render_table. It uses explode with the
delimiter, but this character can also be in the cell itself.

This patch uses the PHP function str_getcsv, which is supported from PHP
version 5.3 >

Change-Id: I5707b006ab1143c108473e5ed7079e6e65cdddca
Fixes: #47356
Releases: 6.0, 6.1, 6.2
Reviewed-on: https://review.typo3.org/22001
Reviewed-by: Wouter Wolters
Tested-by: Wouter Wolters