fix(项目设置): 修复环境配置中http配置模块条件控制台报错的缺陷 (#15992)

--bug=1015066 --user=王孝刚 [接口测试]#15958v1.20.10 环境配置 - http配置 - 启用条件选择模块 -
选择模块保存后无法删除 https://www.tapd.cn/55049933/s/1205075

Co-authored-by: wxg0103 <727495428@qq.com>

frontend/src/business/components/api/automation/scenario/variable/VariableList.vue

@@ -368,7 +368,7 @@ export default {
       this.editData = {delimiter: ",", quotedData: 'false', files: []};
       this.editData.type = this.selectType;
       this.showDelete = false;
-      if (this.editData.type === 'CSV') {
+      if (this.editData.type === 'CSV' && this.$refs.csv) {
         this.$refs.csv.cleanPreview();
       }
       this.$refs.variableTable.cancelCurrentRow();

frontend/src/business/components/common/select-tree/SelectTree.vue

@@ -1,7 +1,8 @@
 <template>
   <div v-loading="loading">
     <div class="mask" v-show="isShowSelect"></div>
-    <el-popover placement="bottom-start" :width="popoverWidth" trigger="manual" v-model="isShowSelect" @hide="popoverHide" v-outside-click="outsideClick">
+    <el-popover placement="bottom-start" :width="popoverWidth" trigger="manual" v-model="isShowSelect"
+                @hide="popoverHide" v-outside-click="outsideClick">
       <el-input
         size="mini"
         prefix-icon="el-icon-search"
@@ -32,7 +33,9 @@
         <el-option v-for="item in options" :key="item.value" :label="item.label" :value="item.value"></el-option>
       </el-select>
       <el-row>
-        <el-button v-if="multiple" class="ok" @click="isShowSelect=false" size="mini" type="text">{{ $t('commons.confirm') }}</el-button>
+        <el-button v-if="multiple" class="ok" @click="isShowSelect=false" size="mini" type="text">
+          {{ $t('commons.confirm') }}
+        </el-button>
       </el-row>
     </el-popover>
   </div>
@@ -271,8 +274,11 @@ export default {
         });
         this.returnDatas = t;
       }
+
       this.selectNodeIds = [];
+      if (data) {
         this.getChildNodeId(data, this.selectNodeIds);
+      }
     },
     getChildNodeId(rootNode, nodeIds) {
       //递归获取所有子节点ID