Sidebar on Nautilus Nightly won't hide, even when asked nicely (43.rc-e11f9dd5d)

Applications
7

I think your concern is not with the keyboard shortcut, but with the ability to change the application UI design to your preference.

In previous versions, there was an option to hide the sidebar, as a way to allow making windows narrower.

Now that we can get narrow automatically, the option to manually hide the sidebar is no longer needed.