FIX: add a string for the Unseen view tab tooltip (#14079)

FIX: add a string for the Unseen view tab tooltip (#14079)

diff --git a/config/locales/client.en.yml b/config/locales/client.en.yml
index c0a241f..9f24c2f 100644
--- a/config/locales/client.en.yml
+++ b/config/locales/client.en.yml
@@ -3444,6 +3444,7 @@ en:
       unseen:
         title: "Unseen"
         lower_title: "unseen"
+        help: "new topics and topics you are currently watching or tracking with unread posts"
       new:
         lower_title_with_count:
           one: "%{count} new"

GitHub sha: ded6a4a0eac3ad81efde9e15b7dd3c9720d665b5

This commit appears in #14079 which was approved by eviltrout. It was merged by AndrewPrigorshnev.