add exit title preference to group and add command for setting the preference

src/ui/console.c

@@ -958,6 +958,16 @@ cons_titlebar_setting(void)
     }
 }
 
+void
+cons_exittitle_setting(void)
+{
+    if (prefs_get_boolean(PREF_EXIT_TITLE)) {
+        cons_show("Exit title display (/exittitle)  : ON");
+    } else {
+        cons_show("Exit title display (/exittitle)  : OFF");
+    }
+}
+
 void
 cons_roster_setting(void)
 {