- start with first timestamp of first dataset in timeseries chart

src/shared/models/options.ts

@@ -1,3 +1,5 @@
+import { FirstLastValue } from './dataset';
+
 export class DatasetOptions {
 
     /**
@@ -67,6 +69,9 @@ export class DatasetOptions {
      */
     public yAxisRange?: MinMaxRange;
 
+    public firstValue: FirstLastValue;
+    public lastValue: FirstLastValue;
+
     constructor(
         internalId: string,
         color: string