Style of QVBoxLayout is not that good.

[leoheck]

Sections like this

Are not quite good on OpenTheme, see

OpenTheme just have this thick line on top that does not look refined as the whole theme. It could be improved.

[obelisk79]

Those box outlines are terrible, I styled them to look as bars intentionally, but the bar style only makes sense when the QGroupBox has a title. Could be tricky to resolve in an elegant manner and not abandon my stylistic choices

[leoheck]

Honestly, even when they have title they are horrible. But I understand it may be hard to tweak. Isn't it better to have a bit thinner line at the top? The idea seems better for me. And maybe a another line at the bottom, with a different thickness and an extra bottom margin.