patch 8.2.2246: cursor keys not recognized at the hit-Enter prompt

Problem:    Cursor keys not recognized at the hit-Enter prompt after executing
            an external command.
Solution:   Change the codes for the extra cursor keys. (closes #7562)
            Tune the delays to avoid test flakyness.

src/version.c

@@ -750,6 +750,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    2246,
 /**/
     2245,
 /**/