Current refactoring removed this entire block of code, I am unclear if it is actually needed and don't want to break anything - but it would be good to get rid of it if not being used.

Similar code exists in `app/models/topic_list.rb`

* all tests are passing, so there was no coverage for this particular block of code
* I am not sure if this splitting code is needed anymore?
* appears that `,` and `-` can be added to `SiteSetting.top_menu` but I did not notice any extra functionality on the menu when adding a `,`
  * set top_menu to `latest,The HOME PAGE|new|unread|favorited|categories` and restarted my dev server with no apparent changes

From admin/site_settings top_menu setting

> Determine which items appear in the homepage navigation, and in what order. Example latest|hot|read|favorited|unread|new|posted|categories

is there any additional documentation on the site settings - `top_menu`