添加删除图标

src/views/order-list/order-list.vue

@@ -20,6 +20,7 @@
                  <el-col :span="8">
                     <el-form-item label="风险定级">
                         <el-select
+                            clearable
                             v-model="searchParam.riskLevel"
                             placeholder="请选择风险等级">
                             <el-option