Hello and thank you for answering.
I need the navigation pane because I can add my own shortcuts (29 shortcuts currently) under favorites. However, I do not have a network in my house therefore I do not need homegroup and network in navigation pane. These items, along with computer shortcut, consume a lot of vertical space and by adding my own shortcuts under favorites I get a scroll bar, which I do not want to have. I can add a shortcut for my computer under favorites or for network if I wish so in the future.