[Bug 40705] New: foobar2000 - Equalizer preset buttons missing/invisible

https://bugs.winehq.org/show_bug.cgi?id=40705

Bug ID: 40705
           Summary: foobar2000 - Equalizer preset buttons
                    missing/invisible
           Product: Wine
           Version: 1.9.11
          Hardware: x86
                OS: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: -unknown
          Assignee: [e-mail]
          Reporter: [e-mail]
      Distribution: ---

Created attachment 54589
  --> https://bugs.winehq.org/attachment.cgi?id=54589
Foobar2000 equalizer under Wine.

I'm using foobar2000 1.3.10. I first encountered this issue on Ubuntu 16.04
Cinnamon and Wine 1.6.2 x64, on a (I think) 32-bit wineprefix.

# Setup

* I also replicated this issue in Wine 1.9.10, 32-bit (PlayOnLinux).
* To (hopefully) avoid foobar2000-specific tweaks, I used [Install dialog] ->
_Install a non-listed program_. Then I created a new app profile and installed
foobar2000.

# Procedure

* Launch foobar2000. Press Ctrl-P to open Options.
* There's a tree at the left. Expand the Playback entry, and click DSP Manager.
* There will be two white boxes. On the right side, locate "Equalizer" and
double-click it.
* On the top of the dialog, click the "Configure selected" button.

# Result

There should be a combo box of presets, as well as a "load" or "save" button.

These are missing under Wine.

I tried using both theming on and off.

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Is this a font bug?