fix(SidebarItem.vue): 收缩状态下的菜单栏鼠标悬停不展示问题修复

src/layout/components/Sidebar/SidebarItem.vue

@@ -10,7 +10,7 @@
         </el-menu-item>
       </app-link>
     </template>
-    <el-sub-menu v-else :index="resolvePath(item.path)">
+    <el-sub-menu v-else :index="resolvePath(item.path)" popper-append-to-body>
       <!-- popper-append-to-body -->
       <template #title>
         <svg-icon v-if="item.meta && item.meta.icon" :icon-class="item.meta.icon"></svg-icon>