Michael,
I know it's not something that is supported yet, and since I'm such a noob i wont drag you over the coals looking to get too many details, but wanted to see if a quick explanation would help me get pointed right, or convince me to abandon...

I'm looking at controling this area where the "Scene Browser" is:



Though when I look in the sidepane, I get a bit lost as I cant navigate how things are working here... I can put a simple "Button" as I have with the edit panel and an icon to launch the "plugin gallery", but was trying to figure out the connect with the tree that appears below the scene browser so I can review and try to replicate what you have done here...

I find the placement here, and also place some text as shown, but dont see how the "Styles, types and names trees are presented..



Perhaps this is being done internally???

Any brief help is appreciated....