fix(系统设置): 修复http配置-批量添加请求头value缺失的缺陷

--bug=1011432 --user=王孝刚
【环境配置】http配置-批量添加请求头（f12复制的接口请求数据）-host、Origin、Referer对应key数据缺失
https://www.tapd.cn/55049933/s/1121550

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

@@ -420,12 +420,12 @@ export default {
       let keyValues = [];
       params.forEach(item => {
         let line = item.split(/：|:/);
+        let values = item.split(line[0] + ":");
         let required = false;
         keyValues.unshift(new KeyValue({
           name: line[0],
           required: required,
-          value: line[1],
-          description: line[2],
+          value: values[1],
           type: "text",
           valid: false,
           file: false,