Crash setting the style

[diegoiast]

Using f33e7ff, and Qt 6.8.0 from the "official" builds (installed using aqt).

If I set the theme the program crashes on some thread, while QAccesible::queryAccesibleInterface(). Stack trace is borked, so no other details can be added.

I can reproduce this under Fedora 41 (system Qt is 6.7, but I am linking/running against 6.8 installed using aqt). Can reproduce under Debian testing as well (using the same aqt setup). What happens is that on startup I call QCombobox::setCurrentIndex(). Seems kinda random.