* include/commctrl.h (HDITEM[AW]): Rename _HD_ITEM[AW] to
_HDITEM[AW], with parallel changes to typedefs. Use defines for
backward compatability with old names. Update UNICODE mappings.
(HDLAYOUT): Remove struct _HD_LAYOUT_XP. Use new typedefs
for struct _HD_LAYOUT and add defines for backward
compatability with old names.
(NMLISTVIEW): Rename _NM_LISTVIEW to tagNMLISTVIEW, with
parallel chages to typedefs. Add defines for backward
compatability with old names.
(TCHITTESTINFO, IMAGELISTDRAWPARAMS): Fix _WIN32_IE guard.