Quick map improvements to make

[Adamouization]

• Move map-specific functions away from main.js to map.js (getGeoJsonFromCases and standardiseGeoJson functions)
• In the map tooltip, multiply the "infections per 1000" by 1000 and round to 2 or 3 decimals and add a "per thousand symbol" (like % but with three circles)
• Remove cases/recoveries/deaths info from the tooltip, the lollipop chart should show this instead.
• Fix map legend duplication (see image below)