* More responsive React updates on scroll
* `Icon`s now use shadow dom
* Faster Sparkline
* Recycle table rows
* Separate Header from Chain to avoid vdom diffing
* Separate THead from Row.HEADER to avoid vdom diffing
* Throttle rendering updates on chain tabs, also styles
* Minor tweaks and fixes
* Created components for all columns
* Wrapping up Column refactor
* Rename Row--td to Column
* Lazy `Ago`
* Update styles for faster layouting
* Minor cleanup
* Fix Connection
* Use shadow DOM in `PolkadotIcon`
* Comments and tweaks for the List component
* Faster Tooltip and Truncate
* Minor tweaks
* Tooltiped columns can now be copied
* Future-proof Connection
* Remove the <div> wrapper from Icon
* Fix dash on missing graph data
* Clean up some SVGs
* Cleanup and comments
* Localize the use of `previousKeys` to `recalculateKeys`
* Custom appState disjoint from React component state
* Make appState and appUpdate refs readonly
* Cleanup
James Wilson