Open top-left menu in Dolphin explorer with keyboard shortcut

I am looking for a way to open this menu in the Dolphin file explorer with a keyboard shortcut. (It can be invoked by clicking on the icon in the top-left.)  I looked through the available keyboard shortcuts, but I couldn't find anything that looked like it referenced this menu. For reference, I am trying to emulate the behavior on Windows where a similar menu appears in response to the Alt-Space shortcut.