[Bug 58514] New: Dropdown menus are black in a .NET Framework 4.5 program

[WineHQ Bugzilla]

http://bugs.winehq.org/show_bug.cgi?id=58514

Bug ID: 58514
           Summary: Dropdown menus are black in a .NET Framework 4.5
                    program
           Product: Wine
           Version: 10.12
          Hardware: x86-64
                OS: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: -unknown
          Assignee: [e-mail]
          Reporter: [e-mail]
      Distribution: ---

Created attachment 78983
  --> http://bugs.winehq.org/attachment.cgi?id=78983
Error

I'm using this Pokémon games save editor: 
https://github.com/trigger-segfault/TriggersPC

As the wiki states
(https://github.com/trigger-segfault/TriggersPC/wiki/Troubleshooting) it needs
.NET Framework 4.5.

The programs do open, but dropdown menus are black (still clickable but not
clearly visible).

I've attached the logs. The part related to the menus seems to be:
0128:fixme:wtsapi:WTSRegisterSessionNotification Stub 0002008C 0x00000000
0128:fixme:uiautomation:UiaReturnRawElementProvider Unsupported object id -4,
ignoring.