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.
diff --git a/src/version.c b/src/version.c
index 47b044f..e9e0446 100644
--- a/src/version.c
+++ b/src/version.c
@@ -778,6 +778,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1718,
+/**/
     1717,
 /**/
     1716,