Add `Html.Lazy` to the top-level triangle.

[zwilias]

This saves re-rendering the entire triangle for every single frame, only requiring a full rerender when a node is "activated" or the text changes. Note that this could probably be used recursively too, to optimize the tree further down the line.

However, just adding it as a wrapper was the simplest change with a significant impact.

For comparison, a before-and-after:

Becomes...

[furrary]

It's a huge performance gain. Thanks a lot.