Themed scroll bar width and height are 17 pixels on XP. Fix that Light theme scroll bar arrow glyphs look off by 1
pixel. The combo button glyphs also have to be moved by 1 pixel because it was designed against the old scroll bar
arrow button width and height.
Signed-off-by: Zhiyi Zhang <zzhang@codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard@winehq.org>