How to get rid of these borders?

[Niiisse]

https://imgur.com/CniO7Xu

For testing purposes, I've made #inputLine blue, QListView#resultsList red and QListView#actionList green. I can't figure out how to get rid of the black horizontal borders inbetween the sections. Surely it's a simple element I'm missing somewhere, but I can't find it. How do I get rid of those borders? Help is much appreciated :)

here's my config, btw

[ManuelSchneid3r]

bad news https://forum.qt.io/post/487610

an overhaul for the style of the wbm is planned. such that we have simple ini files with key value pairs. thats annoying because we have to handle each and every possible style property, but a generic approach using qt simply does not exist yet (and qml is to slow)