[FR] Ability to disable button 3D widget border

[DodoLeDev]

Hello! Firstly, thank you for this amazing project!

I've been using this theme for several months now, and everything is just better than the original Breeze theme!

However, I have a little problem with Qt widgets style when using the dark color scheme :

Do you see that little border color at the top? I wonder if there is a way to remove it....

Any help is appreciated!

Thanks in advance!