P: Alt-drag on Windows doesn't expand Library panels like Opt-drag on Mac

On Mac, holding Opt while dragging a panel divider lets you expand the panel as wide as you want.  But Alt-drag doesn't work on Windows 10 / LR 7.  (I recall that this used to work in Windows, but that could be a false memory.)

Expanding the panels extra wide can be very helpful to see deep hierarchies and long names with folders, collections, and keywords.