patch 8.1.1718: popup menu highlighting does not look good

Problem:    Popup menu highlighting does not look good.
Solution:   Highlight the whole window line.  Fix that sign line HL is not
            displayed in a window with a background color.

src/version.c

@@ -777,6 +777,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    1718,
 /**/
     1717,
 /**/