DM-7702: fixed bug, function PlotState.getRangeValues was accidently removed.

Author: robyww

src/firefly/js/visualize/PlotState.js

@@ -207,6 +207,14 @@ export class PlotState {
     }
     getPrimaryCubePlaneNumber() { return this.get(this.firstBand()).getCubePlaneNumber(); }
 
+
+    /**
+     * Get the range values for the plot.
+     * @param {band} [band] the band get range value for, parameter is unnecessary for non-three color plots
+     * @return {RangeValues}
+     */
+    getRangeValues(band) { return this.get(band || this.firstBand()).getRangeValues(); }
+
     /**
      *
      * @return {RangeValues}