* QB modes, actions, and drill throughs.

* Refactor drill throughs + misc bug fixes

* Port sort action to drills

* Smarter 'view this/these' name

* Scalar hover state

* QB actions: don't skip action selection screen unless the action is marked as 'default'

* Fix flow errors

* Fix drills

* Show "This X's Ys" for FKs

* Prevent qb from uneccesary push states

* Don't show (fk) breakout fields that have already been broken out

* Fix 'drill into this' unit

* Cleanup timeseries footer

* Cleanup qb selectors

* Namespace all qb actions

* Make modes dependent on previously run card

* More timeseries footer cleanup

* Fix table crash

* Make breakout legend clickable

* Fix datagrid pivot test

* Flow + lint

See http://roadtolarissa.com/coloring-maps/ and
http://bl.ocks.org/thadk/37ff4c03358b414acd1e as to why this is a better
solution than quantize.

* jest setup and simple tests for Button

* add jest to CI

* cleanup

* make eslint play nice

Use ResizeObserver ponyfill for ExplicitSize HOC to ensure it updates the size in all cases, not just window resizes

Use ResizeObserver ponyfill for ExplicitSize HOC to ensure it updates the size in all cases, not just window resizes