Allow query-params option on completion module

We'll need to do a filter_by on the vehicle licensing digital take-up
graphs, and this seems like the best way to do that.
Remove unnecessary dashboard-title from dashboard
Add digital take-up graph to vehicle dashboards
Hide realtime sparkline in a 2-col layout

There isn't enough room for it, so until we have proper designs
with expected behaviour we should just hide it.
Merge pull request #305 from alphagov/digital-takeup-vehicle-licensing

Digital take-up vehicle licensing