patch 9.1.0954: popupmenu.c can be improved

Problem:  popupmenu.c can be improved
Solution: slightly refactor the logic
          (glepnir)

closes: #16271

Replace some if blocks and combine user attr abstract to an inline
function.

Signed-off-by: glepnir <glephunter@gmail.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>

src/version.c

@@ -704,6 +704,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    954,
 /**/
     953,
 /**/