TYPO3 Core

The field configuration of fields in DCEs is this:

        'fields' => array(
            'exclude' => 0,
            'label' => $ll . 'tx_dce_domain_model_dce.fields',
            'config' => array(
                'type' => 'inline',
                'foreign_table' => 'tx_dce_domain_model_dcefield',
                'MM' => 'tx_dce_dce_dcefield_mm',
                'minitems' => 1,
                'maxitems' => 999,
                'appearance' => array(
                    'enabledControls' => array(
                        'hide' => false,
                        'dragdrop' => true,
                        'sort' => true,
                    ),
                    'levelLinksPosition' => 'both',
                ),
            ),
        ),

And I have attached a screenshot, of what happend in current devmaster.

I've created a new DCE with a new field and saved it. This is the dialog.

And when you create a new field no child entry fields are visible but "hidden".