[Bug 42340] New: Wrong decorations with KWin (KDE Plasma 5)

https://bugs.winehq.org/show_bug.cgi?id=42340

Bug ID: 42340
           Summary: Wrong decorations with KWin (KDE Plasma 5)
           Product: Wine
           Version: 2.0-rc6
          Hardware: x86
                OS: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: -unknown
          Assignee: [e-mail]
          Reporter: [e-mail]
      Distribution: ArchLinux

Created attachment 57102
  --> https://bugs.winehq.org/attachment.cgi?id=57102
Testprogram to show wrong decorations

Setting "Allow the window manager to decorate the windows" in winecfg solves
the issue.

There are two issues:
-Minimize box is always shown
-Maximize box is only shown when WS_THICKFRAME is also used

Testprogram attached.