Depending on the theme, if there was a header,
the border ends up painted lower than it should be,
and clipped by the header.
7-Zip file manager, the reason why the offset was added in 5f0dcf79185941c4faff35d1cc9c758160f3a27d in the first place, still renders correctly.
Before:
![before](/uploads/8321f45c657469278b2787edfa147b20/before.png)
After:
![after](/uploads/013241f4cd3b893c7f4073b6a9fe8119/after.png)
--
https://gitlab.winehq.org/wine/wine/-/merge_requests/1878