Although you can initially move up and down the sidebar menu with the up/down arrow keys once you have entered the right hand panel you can't get back to the sidebar. Your sidebar option remains highlighted but the up/down arrows have no effect.
As the tab key can also be used to enter the right hand panel then logically I think that shift-tab should also get you back to navigating the sidebar but it doesn't.
Although you can initially move up and down the sidebar menu with the up/down arrow keys once you have entered the right hand panel you can't get back to the sidebar. Your sidebar option remains highlighted but the up/down arrows have no effect.
As the tab key can also be used to enter the right hand panel then logically I think that shift-tab should also get you back to navigating the sidebar but it doesn't.