[TASK] Unify EXT: beuser html table semantics (t3-table)

Bring common html structure for EXT: beuser table. The other
table (above in code) has already been changed before.

Resolves: #61267
Releases: 6.3
Change-Id: I88f688ed421dcf8b2984fe3a1e0204b3ed6e19cf
Reviewed-on: http://review.typo3.org/32504
Reviewed-by: Alexander Opitz <opitz.alexander@googlemail.com>
Tested-by: Alexander Opitz <opitz.alexander@googlemail.com>
Reviewed-by: Wouter Wolters <typo3@wouterwolters.nl>
Tested-by: Wouter Wolters <typo3@wouterwolters.nl>