comdlg32-colordlg fix bgcolor

[Dmitry Timoshkov]

"Ivan Sinitsin" <ivan at etersoft.ru> wrote:

> The patch corrects background color of a dialogue window " Choose color " at 
> copying a triangular marker, the user colors and the predetermined colors. 
> Earlier the background about these elements was more dark than the basic 
> background of a window.

> +   SetClassLongPtrW( hwnd, GCLP_HBRBACKGROUND, (LONG_PTR) GetSysColorBrush(COLOR_BTNFACE));

This fix is not correct, think for instance about different color themes.
Probably CC_PaintTriangle needs to specify the background color of a triangle
explicitly.

-- 
Dmitry.