[TASK] Raise requirement to 6.2

Change-Id: I70da20bca20a7f164ee3e8a462ebe80d8ce673ce
Reviewed-on: https://review.typo3.org/27288
Reviewed-by: Georg Ringer
Tested-by: Georg Ringer
[TASK] Change CSS class typo3-dblist to t3-table

Change-Id: I22419aea0d8696405ad89c8adcca3761b06d620a
Reviewed-on: https://review.typo3.org/27287
Reviewed-by: Georg Ringer
Tested-by: Georg Ringer