Fairly blocking functional bugs on funnels.

1. This state comes in unexpectedly when building funnels. Initially reported as a problem with having no breakdown values that match a query, you can see in this recording that this funnel should have results, $pageview is the first event with no filters, there's always a Pageview. Further, if you refresh, the funnel renders.

2. There's some strange bug where the bars don't get properly rendered.

3. Time to convert doesn’t “height: 100%”
   

4. The historical conversion should be a line chart

CC @mariusandra