feat(discover): Use URL parameters for each visualization

[billyvg]

Instead of using component state, use url parameters as data source for which chart gets displayed. This will be helpful when navigating from other parts of the application to a discover query.

[billyvg]

react-router checks for this

[lynnagara]

This seems to break toggling in discover. I'd also suggest dropping this keepVisual option and just doing this by default. I think it'd be good to move some of this code into a utility function that validates the visualization requested against the query rather than in the main discover.jsx component

[billyvg]

@lynnagara Ah this is completely broken - I initially was comparing location.query instead of location.search in cWRP but it broke all the tests because they only updated search. I think manipulating query makes it a bit easier when removing/clearing query params.

The problem with always keeping visual is when you're in a by day chart and you edit your query so that it doesn't support grouping by time (e.g. can only render a Table result), how do you suggest we get around that?

[billyvg]

Updated: 6a44b31

[lynnagara]

Here's an example of how I think the persistent querystring can work - i don't think it's significantly more complicated #11467