fix[Logout]: click blank area of ​​dropDown able to logout (#2896)

Author: wangshantao

src/layout/components/Navbar.vue

@@ -44,8 +44,8 @@
           <a target="_blank" href="https://panjiachen.github.io/vue-element-admin-site/#/">
             <el-dropdown-item>Docs</el-dropdown-item>
           </a>
-          <el-dropdown-item divided>
-            <span style="display:block;" @click="logout">{{ $t('navbar.logOut') }}</span>
+          <el-dropdown-item divided @click.native="logout">
+            <span style="display:block;">{{ $t('navbar.logOut') }}</span>
           </el-dropdown-item>
         </el-dropdown-menu>
       </el-dropdown>