def click_save_changes_button(self):
        self.driver.find_visible_element(by_css(".yes_button")).click()
        self.driver.wait_until_element_is_not_present(UI_TEST_TIMEOUT, by_css(".ui-dialog-titlebar"))
        self.driver.wait_until_element_is_not_present(UI_TEST_TIMEOUT, by_css(".blockPage"))