Gtk+ window scaling issue

Support
1

I’m running KDE Neon, after updating Lutris 0.5.0, I have a issue with the gtk+ window border scaling, it’s appear only on Manage Runners.

My spec:
https://paste.ubuntu.com/p/hpJDH6SRmH/

Debug output:
https://paste.ubuntu.com/p/2GFRDfzTWC/

Screenshot_20190202_180127
Screenshot_20190202_180127.png884×800 56 KB

2

this is an padding not a border! content padding ^^
btw gtk looks always not realy good i find qt better