when set_window_pos the second param is HWND_TOPMOST,
window with WS_CHILD do not change z order.

Signed-off-by: cuijiajin <cuijiajin@uniontech.com>
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 dlls/user32/tests/win.c | 88 +++++++++++++++++++++++++++++++++++++++++
 dlls/user32/winpos.c    |  6 +++
 2 files changed, 94 insertions(+)

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