I wonder if the option below exists or can be implemented if missing.
By creating a rule, messages go to a folder and once that folder is added as Favorite, the unread message count is missing. It will be a nice to have feature.
JS folder has 5 UNREAD message while ALL INBOX folder has one. User should be able to see UNREAD message count of any folder without having to move out from the Inbox. The UNREAD count of 6 is not enough because it is a generic one.