How to add a separator to the Menu?

[ultimaweapon]

Let's say I have the following menu bar:

    MenuBar {
        // Help.
        Menu {
            title: "Help";

            MenuItem {
                title: "Report Issue";
            }

            MenuItem {
                title: "About";
                activated => {
                    about();
                }
            }
        }
    }

How to add a horizontal line (AKA menu separator) in between Report Issue and About?

[ogoffart]

This hasn't been implemented yet.
I just opened a tracking issue for it: #7790