Data table and median data now work

...s/monitoring-location/components/hydrograph/data-table.js

...nitoring-location/components/hydrograph/graph-controls.js

...cripts/monitoring-location/components/hydrograph/index.js

...oring-location/components/hydrograph/selectors/iv-data.js

...g-location/components/hydrograph/selectors/legend-data.js

...oring-location/components/hydrograph/time-series-graph.js

...oring-location/components/hydrograph/time-series-lines.js

...monitoring-location/selectors/hydrograph-data-selector.js

.../src/scripts/monitoring-location/store/hydrograph-data.js