How do I make the ComboBox individual options highlight on mouse hover?

[b-fuze]

So I'm using Slint via the Qt backend with Rust, but when I hover my Combobox the individual options don't respond to mouse hovering:

dropdown-hover-2023-06-15_07.17.39.mp4

I have observed this on both macOS Ventura and Ubuntu Linux 22.04.

How do I get it to behave similar to other Qt applications and highlight each individual option on mouse hover, e.g. VirtualBox's dropdown for instance?

dropdown-hover-vb-2023-06-15_07.18.39.mp4

[ogoffart]

We were not drawing the ComboBox popup correctly with all styles.
I've just fixed that in #2897

[b-fuze]

Awesome, thanks!