用户管理左侧树型组件增加选中高亮保持

@@ -21,6 +21,7 @@
             :filter-node-method="filterNode"
             :filter-node-method="filterNode"
             ref="tree"
             ref="tree"
             default-expand-all
             default-expand-all
+            highlight-current
             @node-click="handleNodeClick"
             @node-click="handleNodeClick"
           />
           />
         </div>
         </div>