comctl32/button: Use the brush from WM_CTLCOLORSTATIC to fill background for checkboxes and radio buttons.

Fix radio buttons of Mupen64-RR-Lua input window having stale background. Mupen64-RR-Lua doesn't actually handle
WM_ERASEBKGND even though it returns nonzero. And tests show that a WM_CTLCOLORSTATIC is sent and the returned brush
is used for filling background, even painting over the content from DrawThemeParentBackground().

Wine-Bug: https://bugs.winehq.org/show_bug.cgi?id=52433Signed-off-by: Zhiyi Zhang <zzhang@codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard@winehq.org>