[Bug 40857] New: Battle.net drop-down menus lack border

https://bugs.winehq.org/show_bug.cgi?id=40857

Bug ID: 40857
           Summary: Battle.net drop-down menus lack border
           Product: Wine
           Version: 1.9.12
          Hardware: x86
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P2
         Component: -unknown
          Assignee: [e-mail]
          Reporter: [e-mail]
      Distribution: ---

Created attachment 54861
  --> https://bugs.winehq.org/attachment.cgi?id=54861
trace+win

To reproduce:
1. Download, install, and open the Battle.net App.
2. Click the region button or the settings button.
3. Wave the mouse pointer over where the menu should appear for it to appear
(bug 33943)

On Windows, the menus are displayed with a border and a triangular protrusion
that points to the associated button. On Wine, this border never appears.

TRACE+win output is attached. Open it with Vim; for some reason `less` thinks
it's a binary file.

I don't know if this is the same as bug 33943. If the same fix solves both
problems, then we can mark both bugs as fixed.

The program version appears to be 7575, and the SHA1 of the installer is
1c60b6f98e13e9cccc61070c0b4c7b2808ee754d.