A toast is a little pop-up that slides or fades in from the edge of the screen.  It's used to notify of events without getting in the way of the UI.  Use the arrow buttons to change the location of the `toast-list` and the plus to add more toasts. Use the chevrons to change the direction toasts are filled in.

This demo starts with the toasts in the most common position on the bottom-right.  You can use the
arrows to test out different combinations and then hit _+_ to add random toasts.
