message: qt: monospaced output in Console on macOS
diff: @@ -866,7 +866,11 @@ void RPCConsole::clear(bool keep_prompt)
  }
  // Set default style sheet
  +#ifdef Q_OS_MAC
  + QFontInfo fixedFontInfo(GUIUtil::fixedPitchFont(/*use_embedded_font=*/true));
  +#else
  QFontInfo fixedFontInfo(GUIUtil::fixedPitchFont());
  +#endif
  ui->messagesWidget->document()->setDefaultStyleSheet(
  QString(
  "table { }"
  