Stats Page Revamp Stage 2

[kengoy]

UI Spec: https://www.figma.com/file/iUS5LdAnuTKVei88QwPPCH/Bay-Area-Pandemic-Dashboard-(PanDa)-by-Bay-Area-Brigades?node-id=1286%3A5448

Sub Dev Tasks

• Add a UI component for "Select Counties to Compare"
• Add buttons for 9 counties
• Assign a nice color for each country for selectetd status.
• Add a UI component for the line chart
• Prepare data(or calculate from existing data) for cases per 1000 people
• Prepare data(or calculate from existing data) for Percent Increase in 7 Days

TBD Support "Bay Area Average" "California Average" "National Average" as there is no data available in the data scraper we use.