patch 8.2.3236: mode() does not indicate using CTRL-O in Select mode

Problem:    mode() does not indicate using CTRL-O in Select mode.
Solution:   Use "vs" and similar. (closes #8640)
diff --git a/src/misc1.c b/src/misc1.c
index 7d7f022..9708502 100644
--- a/src/misc1.c
+++ b/src/misc1.c
@@ -652,7 +652,11 @@
 	if (VIsual_select)
 	    buf[0] = VIsual_mode + 's' - 'v';
 	else
+	{
 	    buf[0] = VIsual_mode;
+	    if (restart_VIsual_select)
+	        buf[1] = 's';
+	}
     }
     else if (State == HITRETURN || State == ASKMORE || State == SETWSIZE
 		|| State == CONFIRM)