Incorrect interactive figure

[DaniBodor]

It seems that the figure illustrating edge pooling (with caption "Hover over a node (black node) to visualize which edges are gathered and aggregated to produce an embedding for that target node.") is wrong. It shows one too many boxplots, e.g. hovering over the bottom left node shows 3 boxes that are aggregated even though there are only 2 edge.
I believe that what it is showing is the message passing operation rather than the pooling operation.

[DaniBodor]

just realized this is a (partial) duplicate of #19