Fix PopupMenu losing item highlight when hovering submenus

[YeldhamDev]

Used to work before, but broke somewhere down the road.

Before	After

[Calinou]

Tested locally on Linux (X11) with single-window mode disabled, it doesn't work on my end. The highlight is still gone when using mouse navigation (with or without clicking to make the submenu appear earlier), although it works with keyboard navigation like it did before.

popupmenu_highlight_editor.mp4

[YeldhamDev]

Well, the problem is that I'm on Fedora Kinoite, which makes it a little convoluted for me to install X11 in order to test this. 😖

[YeldhamDev]

@Calinou Try again, should be fixed.

[Calinou]

Works great now 🙂

Code looks good to me.

[bruvzg]

Seems to be working on macOS and Windows.

Sometimes it's blinking when mouse is moving to submenu, but it's hard to reproduce:

Untitled.mov

[Repiteo]

Thanks!