switch/application/admin/command/Crud/stubs/add.stub

<form id="add-form" class="form-horizontal" role="form" data-toggle="validator" method="POST" action="">

{%addList%}
    <div class="form-group layer-footer">
        <label class="control-label col-xs-12 col-sm-2"></label>
        <div class="col-xs-12 col-sm-8">
            <button type="submit" class="btn btn-success btn-embossed disabled">{:__('OK')}</button>
            <button type="reset" class="btn btn-default btn-embossed">{:__('Reset')}</button>
        </div>
    </div>
</form>