-- v2: winex11: Directly use ntdll in more places. win32u: Allow NULL client_menu_name in NtUserRegisterClassExWOW. winex11: Reimplement EVENT_DropFromOffiX using get_dos_file_name. winex11: Use import_text_uri_list code in EVENT_DropURLs. winex11: Use ntdll for Unicode conversion. winex11: Directly use wine_nt_to_unix_file_name to get Unix path name. winex11: Use ntdll_umbstowcs and ntdll_wcstoumbs for Unicode conversion.