[COMDLG32] Set background to transparent for font dialog sample text

Import Wine commit wine-5.19-325-g4273004e65a:
https://source.winehq.org/git/wine.git/commit/4273004e65addb70b3f7d91e95eb3d5da31ffa3e

CORE-18588

dll/win32/comdlg32/fontdlg.c

@@ -1186,6 +1186,7 @@ static LRESULT CFn_WMPaint(HWND hDlg, WPARAM wParam, LPARAM lParam, const CHOOSE
         /* Draw the sample text itself */
         hOrigFont = SelectObject( hdc, CreateFontIndirectW( &lf ) );
         SetTextColor( hdc, lpcf->rgbColors );
+        SetBkMode( hdc, TRANSPARENT );
 
         DrawTextW( hdc,
                 sample_lang_text[CHARSET_ORDER[lpcf->lpLogFont->lfCharSet]],