[-] BO : added import button on listing

controllers/admin/AdminCustomersController.php

@@ -184,6 +184,11 @@ class AdminCustomersControllerCore extends AdminController
 		parent::initToolbar();
 		if (!$this->can_add_customer)
 			unset($this->toolbar_btn['new']);
+		else
+			$this->toolbar_btn['import'] = array(
+				'href' => $this->context->link->getAdminLink('AdminImport', true).'&import_type='.$this->table,
+				'desc' => $this->l('Import')
+			);
 	}
 
 	public function initProcess()