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.

src/version.c

@@ -734,6 +734,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    5047,
 /**/
     5046,
 /**/