quick stub commit before moving on with better looking data
json for stubbing volumetrics
Add EVL digital uptake collection and stub responses
Make Tooltip a shared graph component
Merge branch 'master' into add_evl_digital_uptake_module
Let response time graph use shared reference to Tooltip component
Factor out generic 'percentage' graph
Add basic digital take-up module to vehicle-licensing service dashboards
Refactor single stat view and adopt it across various views
Add 'pluralise' method to base View
Add impact number view to digital takeup module
Add more data to SORN and tax-disc digital takeup stub
Fix x position calculation of Tooltip component
Merge master into add_evl_digital_uptake_module
Merge branch 'master' into add_evl_digital_uptake_module
Let time based graphs observe period of query object
Switch digital takeup collection to monthly data

Now using improved collect:sum query. Developed against stub so might require further tweaks.
Add date period formatting method to base View
Switch date formatting for digital takeup number view
Fix feature tests