General graphs across locations

[XDoubleU]

• Data of all locations in total
• Able to filter on location

API:

• Be able to use range endpoint on +1 location
• Be able to use day endpoint on +1 location
• Add endpoint for fetching all locations
• Tests pass
• Check coverage

Web:

• Update api wrapper for range (/all-locations/checkins/range?ids=...) & day (/all-locations/checkins/day?ids=...) endpoint
• Update api wrapper for endpoint for all locations
• Check that old graphs still work
• New page "Graphs", only visible to admin & manager in navigation
• Location filter
• Single location Range works
• Multiple locations Range works
• Single location Range CSV works
• Multiple locations Range CSV works
• Single location Day works
• Multiple locations Day works
• Single location Day CSV works
• Multiple locations Day CSV works