Remove default symbol + keep Chart in memory

Author: aaimio

src/botPage/view/Dialogs/Chart.js

@@ -41,7 +41,6 @@ class ChartContent extends PureComponent {
         this.state = {
             chartType  : 'mountain',
             granularity: 0,
-            symbol     : 'R_100',
             barrierType: undefined,
             high       : undefined,
             low        : undefined,

src/botPage/view/View.js

@@ -43,6 +43,7 @@ import GTM from '../../common/gtm';
 import { saveBeforeUnload } from './blockly/utils';
 
 let realityCheckTimeout;
+let chart;
 
 const api = generateLiveApiInstance();
 
@@ -419,7 +420,10 @@ export default class View {
         });
 
         $('#chartButton').click(() => {
-            const chart = new Chart(api);
+            if (!chart) {
+                chart = new Chart(api);
+            }
+
             chart.open();
         });