NEZ-2389 feat：dashboard chart（group）支持根据variable实现repeat功能

nezha-fronted/src/components/common/panel/panelVariables.vue

@@ -389,13 +389,22 @@ export default {
       })
     },
     close () {
+      let flag = false
       this.labelArr.forEach((item) => {
         if (item.visible && item.multi) {
-          this.$store.dispatch('dispatchVariablesArr', [...this.labelArr])
+          flag = true
         }
         item.visible = false
       })
+      if (flag) {
+        const oldVariables = this.$store.state.panel.variablesArr
+        // 如果新旧值相等 则不执行
+        if (JSON.stringify(oldVariables) !== JSON.stringify(this.labelArr)) {
+          this.$store.dispatch('dispatchVariablesArr', [...this.labelArr])
+        }
+      }
     }
+
   },
   beforeDestroy () {
     this.$store.dispatch('dispatchVariablesArr', [])