* Static Viz Line/Area/Bar Should now respect set Y-axis min/max

The values for y-axis min and max are available to the static-viz js, it is just a matter of pulling them into the y
domain calculations.

This PR also adds a rendering test to the backend unit tests to confirm that the setting is respected through the
render pipeline.

* Make tests better by not re-rendering for every node lookup.

Just render each hiccup tree once, and search that tree multiple times instead. Just straight up a better way to do this test!

* Make variable names clearer so they don't get mistaken for fns