It would be great to get at least a rough dark-mode support (white text is enough) because now it's impossible to read any messages.
I have Dark Mode here and I agree the message list needs attention as they only go white when clicked on, but the messages themselves are black on a white background. I'm still on 10.14.6 here waiting for Catalina to settle down. Usenapp 56.2 (108)
Dark mode should not be visible yet and and disabled for Usenapp, but I was wrong. I understand it looks terrible in dark, because nothing has been done yet to the dark interface.
I'll see what I can do in a short time.
Support for dark mode is disabled in v0.56.3 until Usenapp fully supports it.
v0.72 and up supports dark mode.