maintenance/application/admin/command/Crud/stubs/html/fieldlist-template.stub

            <table class="table fieldlist" data-name="{%fieldName%}" data-template="{%fieldName%}tpl">
                <tr>
                    {%theadList%}
                    <td width="90">{:__('Operate')}</td>
                </tr>
                <tr><td colspan="{%colspan%}">
                <a href="javascript:;" class="btn btn-sm btn-success btn-append"><i class="fa fa-plus"></i> {:__('Append')}</a>
                <textarea name="{%fieldName%}" class="form-control hide" cols="30" rows="5">{%fieldValue%}</textarea>
                </td></tr>
            </table>
            <script type="text/html" id="{%fieldName%}tpl">
                <tr>
                    {%tbodyList%}
                    <td width="90">
                        <span class="btn btn-sm btn-danger btn-remove"><i class="fa fa-times"></i></span>
                        <span class="btn btn-sm btn-primary btn-dragsort"><i class="fa fa-arrows"></i></span>
                    </td>
                </tr>
            </script>