These switches to `VirtualizingStackPanels` seem to have caused some scrollbar weirdness depending on how large your schedule is. I seem to remember our team running into the same thing when they were originally working on it, so they gave up on virtualization.

I don't know if it's a big deal, but it does make it look a little strange. You can notice it when you have a bunch of schedule items, or when you shrink the width of the app to a smaller size.