Breaking: #79622 - Dropping thumbnail configuration for tt_content¶
It is currently not possible to set the thumbnail field depending on
the type of the record. Since tt_content uses different fields to store
media we are removing this default configuration that was set to
by CSS Styled Content and
assets by Fluid Styled Content.
Thumbnails in list view are no longer displayed for tt_content records.
To restore the configuration you need to set the thumbnail field manually to
your preferred choice.
You can do this by simply adding the configuration again in your
$GLOBALS['TCA']['tt_content']['ctrl']['thumbnail'] = 'image';
$GLOBALS['TCA']['tt_content']['ctrl']['thumbnail'] = 'assets';