opencart add admin menu

\system\storage\modification\admin\language\ru-ru\common\column_left.php
$_['text_price']                            = 'Установить наценку';
\system\storage\modification\admin\controller\common\column_left.php
if ($this->user->hasPermission('access', 'pricelist/price')) {
                $extension[] = array(
                    'name'     => $this->language->get('text_price'),
                    'href'     => $this->url->link('pricelist/price', 'token=' . $this->session->data['token'], true),
                    'children' => array()
                );
            }