at the top of the navigation panel you see some buttons next to the search field (light bulbs). With these you can quickly filter the list for connected/disconnected items.
Let me know if this helps.
I had already looked at that... It's a nice option, but we'd like to still be able to see the entire navigation list just like RDCMan.
I've moved your feature request to the Ideas forum. I'm not sure if and when we can implement that as this feature requires some serious changes in our document infrastructure code.
We just recently moved from Remote Desktop Connection Manager, and RDCMan has a built-in group called Connected, which shows you all of your connected sessions in that one group (or folder if you would like) at the top of the left hand navigation / tree menu. Is it possible to create a dynamic folder to replicate this?