winter: Datatable wrong data-field-name if field name with key, and data dont save

Datatable widget generates wrong attribute data-field-name. In my case, I extend form with fields with keys (data[1][row], data[2][row]), and widget generates name “Report[data[1][row]]”. It’s because of logic on 155 string at DataTable.php file.

Temporary fix it with change string to $config->fieldName = $this->getParentForm()->arrayName.'['.implode('][', HtmlHelper::nameToArray($this->fieldName)).']';

I took logic from FormField class.