This is what I would like to achieve, but automatically. I have a Kanban board built into Outlook, and the way I read emails is I double click them and they pop up. You can see my main outlook window behind the tabbed Groupy window with three emails.
Right now, this behavior is that when I have no emails popped up, but have the auto-group enabled for outlook, it will tab the main window, which I do not want. Instead I have to create a tabbed interface of two or more emails, then set auto-group to enabled for it to work.
