NEZ-1784 fix：开启堆叠图后点击刷新按钮图表复位，堆叠图按钮依然是选中状态

nezha-fronted/src/components/chart/chart/chartTimeSeries.vue

@@ -71,6 +71,9 @@ export default {
   },
   methods: {
     initChart (chartOptions = this.chartOption) {
+      try {
+        this.isStack = this.chartInfo.param.stack
+      } catch (e) {}
       const chartOption = lodash.cloneDeep(chartOptions)
       this.legends = []
       this.series = chartOption.series = this.handleTimeSeries(this.chartInfo, chartOption.series[0], this.chartData) // 生成series和legends