Script Summary: Automatically hide all mailboxes without unread items.
This script automatically hide all mailboxes that do not have unread items. A 'toggle mailboxes' button is added to the bottom bar, making easy to hide/show all mailboxes.

Script Summary: Automatically hide all mailboxes without unread items.
This script automatically hide all mailboxes that do not have unread items. A 'toggle mailboxes' button is added to the bottom bar, making easy to hide/show all mailboxes.
