Why does this change do?
This commit updates the educate message displayed when there are no new
topics on the `/new` route when the experimental new new view site setting is enabled.
The commit also fixes a couple of bugs:
1. Correct default auto track minutes used in the copy for unread
topics from the 4 minutes to 5 minutes.
2. Correct link to user's preference in copy to go to tracking tab
instead of notifications tab.