patch 8.2.5047: CurSearch highlight is often wrong

Problem:    CurSearch highlight is often wrong.
Solution:   Remember the last highlighted position and redraw when needed.
diff --git a/src/version.c b/src/version.c
index b7693de..db2a5b2 100644
--- a/src/version.c
+++ b/src/version.c
@@ -735,6 +735,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    5047,
+/**/
     5046,
 /**/
     5045,