I am sorry for repeating myself and bringing this up again, but I really would hate it if it will not be possible to have tabs anymore in the right panel.
This new proposal might look a little bit 'cleaner', but it hides some direct access possibilities, and adds an extra click.
Allow me to quote myself on a former proposal I have done earlier.
Looking at it again, I still believe this would be nice to have: (at least as an option)
I believe this also looks clean, and allows for direct, one-click access to these functions.