If this is possible (even with JS) please advise how with samples
Any screenshots to suggest what you are looking for? and where exactly do you want it (sorry, I can't seem to understand "... with nodes from an object")
And what kind of relationships would you like the TreeView to resolve?
Just same object hierarchical stuff as shown for Org Mgmt above or relationships with other objects as well?
Either way this is not available in Rollbase today. You could file for an enhancement under ideas section (You have my vote) at community.progress.com/.../default.aspx
With custom JS I would like to think it is possible. You would need to understand the current layout for a list view which is basically an Html table. Identify selectors for actions, record name column would be the node element. Resolving hierarchies/relationships to display child nodes will not be trivial.
For the tree rendering you could go about using any tree view plugin. A quick search led me to http://www.jstree.com/ Open source and easy to use.