Tree view component (#900)

* WIP creating a TreeView component

* Very simple tree displaying

* WIP on TreeView types

* The state is computing properly

* Improved the state and types

* Virtualized rendering

* Added state inside the useTreeState hook

* Selection working

* Deselecting nodes

* Toggle selection

* Expanding/collapsing nodes

* Get notifications when changes are made

* Only try show the visible items

* Experiment to try getting cell animations working

* Renamed hook to useTree

* Keyboard navigation is working

* Proper focus support

* Nice selection of the parent by pressing left

* End selects the last visible node

* Showing how the TreeView can accept a selected id and expanded ids from the outside

* The useTree hook now uses selectedId and collapsedIds to make it easier to use

* Check the inputs are valid before applying them, ignore if they’re not

* Don’t allow a selected node to be hidden by collapsed parents

* Nicer API for the onChange callback

* Supports animated collapsing of the tree view

* Nice smooth scrolling

* Removed logs

* Removed unused key

* Remove intricate estimation

* StandardTreeView has lots of good defaults baked in

* Allow passing of parent class name in

* Work on scrolling to the node… needs a bit of a reshuffle

* Just make the TreeView better rather than adding StandardTreeView

* Renamed rowVirtualizer to virtualizer

* Move the virrtualizer into the hook

* Scrolling to selection is working

* Added filtering

Author: matt-aitken