Titlebar colors broken on Windows 7 classic theme

[ask2018]

SumatraPDF version

• 3.5.2, prerelease

Describe the bug
Title bar is broken on Win7 classic theme (I have themes service fully disabled)

To Reproduce

1. Disable themes service
2. Run the application

Expected behavior
It should be same as on version 3.4.6. This is probably related to the Dark theme introduced in 3.5 version.
I've seen similar issues before on other software: SubtitleEdit/subtitleedit#4812

Screenshots

[kjk]

How does it look in pre-release?

I don't have win7 for testing

[ask2018]

I've included the prerelease 3.6. build 15969 screenshot above as well and there it is as well broken. I don't see never build of prerelease atm, but tested again and still the same.

[kjk]

Ah, missed that, thanks.

[trostn]

I have the same problem on Windows 10 since the last update.

[GitHubRulesOK]

@trostn that is possibly not "exactly" the same issue since win 10 is slightly different use of themes but it looks similar
Version 3.5.2 without home will likely look like that ! as does current pre-release

[Cirkutry]

I face the same issue. Sumatra v3.6.16355 (Pre-Release) and Win 10 Pro 1803.

When minimized ^^