Broke after ZBX-24972.

Steps to reproduce:

Add URL into event menu using frontend module.

$main_block['data']['urls'][] = [
    'label' => $grafana_dashboard_name,
    'menu_path' => '',
    'url' => $grafana_dashboard_url,
    'target' => '_blank',
    'confirmation' => '',
    'rel' => 'noopener noreferrer'
];

Result:
'target' => '_blank' is ignored and the URL is opened in the same browser tab.
Expected:
The ability to open links in the same or a new browser tab depending on the needs and tasks of the user.

Temporarily fixed by adding

item.target = data.params.target;

to the /usr/share/zabbix/js/menupopup.js