fix:仪表板全屏预览过滤组件下拉框不显示问题

frontend/src/components/widget/DeWidget/DeSelect.vue

@@ -9,6 +9,7 @@
     :multiple="options.attrs.multiple"
     :placeholder="options.attrs.placeholder"
     @change="changeValue"
+    :popper-append-to-body="false"
   >
     <el-option
       v-for="item in options.attrs.datas"

frontend/src/components/widget/DeWidget/DeTreeSelect.vue

 <template>
 
-  <el-select v-if="options!== null && options.attrs!==null" v-model="values" :multiple="options.attrs.multiple" :placeholder="options.attrs.placeholder" @change="changeValue">
+  <el-select v-if="options!== null && options.attrs!==null" v-model="values" :multiple="options.attrs.multiple" :placeholder="options.attrs.placeholder" :popper-append-to-body="false" @change="changeValue">
     <el-option
       v-for="item in options.attrs.datas"
       :key="item[options.attrs.key]"