Just right-click anywhere in the file's view and press "Reveal in Sidebar."
To make a key-binding, go to Preferences > Key Bindings-User and add:
{ "keys": ["ctrl+shift+r"], "command": "reveal_in_side_bar" }
From here.
与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…