fix(接口自动化) 环境选择问题修复

--bug=1006821 --user=赵勇 【环境配置-HTTP配置】更新一个HTTP配置后无法无法继续创建新的环境域名，需要添加一个undefined://undefined才能继续创建 https://www.tapd.cn/55049933/s/1051584

frontend/src/business/components/api/test/components/environment/EnvironmentHttpConfig.vue

@@ -267,11 +267,11 @@ export default {
         this.condition = {type: "NONE", details: [new KeyValue({name: "", value: "contains"})], protocol: "http", socket: "", domain: "", headers: [new KeyValue()]};
         this.reload();
       }
-      this.$refs.envTable.setCurrentRow(-1);
+      this.$refs.envTable.setCurrentRow(0);
     },
     clear() {
       this.condition = {type: "NONE", details: [new KeyValue({name: "", value: "contains"})], protocol: "http", socket: "", domain: "", headers: [new KeyValue()]};
-      this.$refs.envTable.setCurrentRow(-1);
+      this.$refs.envTable.setCurrentRow(0);
     },
     reload() {
       this.loading = true