DraggableListBuilder's field requirements are confusing; don't require ['#markup']

Not sure but we can fix with this code,

Modify DraggableListBuilderTrait or override buildRow() in DraggableListBuilder:

public function buildRow(EntityInterface $entity) {
  $row = parent::buildRow($entity);

  foreach ($row as $key => $value) {
    if (!is_array($value)) {
      $row[$key] = ['#markup' => $value];
    }
  }

  return $row;
}

kumudb → closed merge request !11399

This came up as the daily BSI target

Seems the original issue was opened 10 years ago and looking at LanguageListBuilder is this still an issue?

So believe this can be closed, looked in the DraggableListBuilderTrait and see it's using plain_text now.

If still an issue in D11 please re-open.