Turbo Render (#298)

* 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

frontend/package.json

@@ -16,17 +16,15 @@
     "clean": "rm -rf node_modules build .nyc env-config.js report*.json yarn-error.log"
   },
   "dependencies": {
-    "@fnando/sparkline": "maciejhirsz/sparkline",
     "@polkadot/util-crypto": "^2.8.1",
     "@types/react-measure": "^2.0.6",
     "blakejs": "^1.1.0",
     "husky": "^4.2.5",
     "lint-staged": "^10.1.7",
-    "react": "^16.13.1",
-    "react-dom": "^16.13.1",
+    "react": "^17.0.1",
+    "react-dom": "^17.0.1",
     "react-measure": "^2.3.0",
     "react-scripts-ts": "3.1.0",
-    "react-svg": "4.1.1",
     "stable": "^0.1.8",
     "tslint": "^6.1.1"
   },
@@ -34,7 +32,6 @@
     "@types/node": "^13.13.2",
     "@types/react": "^16.9.34",
     "@types/react-dom": "^16.9.6",
-    "@types/react-svg": "3.0.0",
     "@types/tape": "^4.13.0",
     "babel-preset-env": "^1.7.0",
     "babel-preset-react": "^6.24.1",