fix:修复panel导入后刷新失败的问题

nezha-fronted/src/components/common/exportXLSX.vue

@@ -141,6 +141,7 @@
         this.$delete(url + '?seq='+this.importResult.seq).then(response=>{
           if(response.code ==  200 ){
             this.$message({duration: 2000, type: 'success', message: this.$t("tip.saveSuccess")});
+            this.$emit('afterImport')
           }else{
             this.$message.error(response.msg);
           }

nezha-fronted/src/components/page/dashboard/panel.vue

@@ -55,7 +55,7 @@
             export-url="/panel/export"
             import-url="/panel/import"
             :params="filter"
-            @afterImport="Refresh"
+            @afterImport="dateChange"
           >
             <template slot="optionZone">
               <button @click="addChart" :title="$t('overall.createChart')"