clearable：添加清除按钮

src/views/monthlyReport/childrenPage/editReport/components/Cascader.vue

@@ -5,6 +5,7 @@
     filterable
     remote
     size="small"
+    clearable
     collapse-tags
     style="width: 100%"
     reserve-keyword

src/views/monthlyReport/childrenPage/editReport/components/CascaderSingle.vue

@@ -2,6 +2,7 @@
   <el-cascader
     v-model="selectValue"
     :options="selectEnum"
+    clearable
     @change="changeCascader" />
 </template>