Yes, you can
<script>
Discourse.ExternalNavItem = Discourse.NavItem.extend({
href : function() {
return this.get('href');
}.property('href')
});
I18n.translations.en.js.filters.unanswered = { title: "Unanswered", help: "Topics that have not be answered" };
Discourse.NavItem.reopenClass({
buildList : function(category, args) {
var currentUser = Discourse.User.current();
var list = this._super(category, args);
if(!category && currentUser != null && currentUser.staff) {
list.push(Discourse.ExternalNavItem.create({href: '/latest?max_posts=1', name: 'unanswered'}));
}
return list;
}
});
</script>