"Open in external window" button in Help mode

Related to my other issue from today, if I view help in an "external window" in Qt Creator, I can press Open In Help mode near the top of the screen, and the documentation window closes and its contents is shown in Help mode of the main window, I can't find a way to do the opposite, though - to move whatever I'm viewing in Help mode to an external window. I think this would be a very useful feature, and it also seems like an "obvious" option to have, as long as you support a separate help window in the first place.