Add CR Capcity + Source (electricitymaps#2381)

* Added CR Capacity

* Add CR capacity Source

* Calculate "unknown" emission value for CR

* Maths Fix

* Fix test

A couple of fixes to how useRemoteEndpoint state is managed (electric…

…itymaps#2303)

Migrate OnboardingModal component to React (electricitymaps#2298)

Observe only finite numerical values in getMaxTotalValue helper in Ar…

…eaGraph component (electricitymaps#2285)

Check that theme is defined when setting it in Map.setCo2color (elect…

…ricitymaps#2275)

Migrate other graphs to React + deprecate LineGraph component (electr…

…icitymaps#2254)

* Introduced CountryHistoryCarbonGraph wrapper component around AreaGraph

* Introduced CountryHistoryPricesGraph wrapper component around AreaGraph

* Got rid of now unused LineGraph component

* Removed renderOpenTooltips

* Better centering of y-axis label

* Parametrize AreaGraph height

* Extract graph mouse action handlers into helpers/history.js

* Introduce PRICES_GRAPH_LAYER_KEY and CARBON_GRAPH_LAYER_KEY constants

* Better handling of graph background mouse events

* Graph background hover over single layer graphs shows tooltip

* Fixed hover events in mobile mode

* Add more prop explanations

* Rename focusFill -> markerFill

FR Capacity + Source Update (electricitymaps#2211)

* FR Capacity And Source Update

Updated FR Capacity to 2019 numbers (from 2018 numbers)

* FR Source Update

FR Source Update From 2018 --> 2019

Added DUK, NEVP, SC (BA), SOCO (electricitymaps#2205)

Switched US-TX and US-BPA to EIA parser to parse historic

Added solar threshold so negative values are capped to 0 (electricity…

…maps#2190)

* Added solar threshold so negative values are capped to 0

* Switched to using validate method