[xubuntu] Middle click of Back/Forward/Up buttons in Thunar

Currently have Xubuntu 16.04 Thunar set up so that middle-click opens folders in a new Thunar window. However, middle-clicking on the Back, Forward, or Up toolbar buttons does nothing; and middle-clicking the items in the Go menu behaves exactly as if I left-clicked them.

How to get middle-clicking the Back/Forward/Up toolbar buttons, and items in the Go menu, to open the destination folder in a new Thunar window, same as middle-clicking folders?