[TYPO3-english] spaceBefore and spaceAfter of Content Elements gone for good?

[Jörg Wagner]

It seems that somewhere on the way from 6.2 to 7 LTS the tt_content
fields spaceBefore and spaceAfter have been removed. Consequentially the
Content Elements have lost their "Top Margin" and "Bottom Margin" fields
too.
I cannot find any information about this removal on the web. Has this
been intentional or is it a bug? What is the rational and what is the
recommended way to add additional spacing between content elements from
now on?