修复 chrome 手机模拟器下长按会关闭弹出菜单的问题

components/uni-im-contextmenu/uni-im-contextmenu.vue

 <template>
-  <view class="root" v-if="isShow" @contextmenu.prevent.native="closeMe">
+  <view class="root" v-if="isShow" @contextmenu.prevent.native="isWidescreen?closeMe():''">
     <view class="uni-im-contextmenu-mark" @touchstart.prevent="closeMe" @click="closeMe"></view>
     <!-- 注意微信小程序下style不支持传obj -->
     <view class="contextmenu" ref="contextmenu" :style="{'left':style.left,'top':style.top,'opacity':style.opacity}">
@@ -11,7 +11,11 @@
 <script>
   // let funList = {}
   let onCloseFnList = [];
+  import uniIm from '@/uni_modules/uni-im/sdk/index.js';
   export default {
+    computed: {
+      ...uniIm.mapState(['isWidescreen']),
+    },
     data() {
       return {
         "isShow":false,