patch 9.0.0452: Visual highlighting extends into virtual text prop

Problem:    Visual highlighting extends into virtual text prop.
Solution:   Do not highlight what isn't actually selected.  Fix ordering of
            stored text props.
diff --git a/src/version.c b/src/version.c
index eafe0a4..26b8bf3 100644
--- a/src/version.c
+++ b/src/version.c
@@ -704,6 +704,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    452,
+/**/
     451,
 /**/
     450,