Turns out, useMatomo() hook can be used in a function that's not a component. It does not need to be passed around from top level.

Added ability to track which nodes are expanded or collapsed

Updated README.md, added more information about this app

Replaced useDispatch with useState, since we really don't need a reducer here

Removed unused variables

Moving styles from classes into makeStyles()

Experimenting with TreeView item styles

Initial commit: Material UI Treeview

Initialize project using Create React App