Persist default axes of a visualization, proof of concept

...tend/src/metabase/dashboard/components/AddSeriesModal.jsx

frontend/src/metabase/dashboard/components/DashCard.jsx

frontend/src/metabase/public/containers/PublicQuestion.jsx

frontend/src/metabase/query_builder/actions.js

...metabase/query_builder/components/VisualizationResult.jsx

frontend/src/metabase/query_builder/selectors.js

.../src/metabase/visualizations/components/ChartSettings.jsx

.../src/metabase/visualizations/components/Visualization.jsx

frontend/src/metabase/visualizations/lib/settings.js

frontend/src/metabase/visualizations/lib/settings/graph.js

frontend/src/metabase/xray/Histogram.jsx

frontend/src/metabase/xray/components/XRayComparison.jsx

frontend/src/metabase/xray/containers/CardXRay.jsx

frontend/test/visualizations/drillthroughs.integ.spec.js