[TASK] Resolve empty table row issue

When saving a table content element an empty row was added
each time.
This issue is resolved by combining the lines to prevent
new line generation.

Resolves: #81050
Releases: master, 8.7
Change-Id: Id67808f10e1f573e587a08c9ff383fc7e0cc4dd5
Reviewed-on: https://review.typo3.org/52658


Tested-by: TYPO3com <no-reply@typo3.com>
Reviewed-by: Mona Muzaffar <mona.muzaffar@gmx.de>
Tested-by: Mona Muzaffar <mona.muzaffar@gmx.de>
Reviewed-by: Wouter Wolters <typo3@wouterwolters.nl>
Tested-by: Wouter Wolters <typo3@wouterwolters.nl>