patch 9.1.0690: cannot set special highlight kind in popupmenu

Problem:  cannot set special highlight kind in popupmenu
Solution: add kind_hlgroup item to complete function
          (glepnir)

closes: #15561

Signed-off-by: glepnir <glephunter@gmail.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>
diff --git a/src/popupmenu.c b/src/popupmenu.c
index 4bc01a5..da8241b 100644
--- a/src/popupmenu.c
+++ b/src/popupmenu.c
@@ -633,6 +633,8 @@
 	    attr = highlight_attr[hlf];
 	    if (pum_array[idx].pum_user_hlattr > 0)
 		attr = hl_combine_attr(attr, pum_array[idx].pum_user_hlattr);
+	    if (round == 1 && pum_array[idx].pum_user_kind_hlattr > 0)
+		attr = hl_combine_attr(attr, pum_array[idx].pum_user_kind_hlattr);
 	    width = 0;
 	    s = NULL;
 	    switch (round)