message: update: collapse active MenuItem if clicked
diff: @@ -32,6 +32,10 @@ export class SideMenu extends React.Component<{ menu: MenuStore; className?: str
  }
  activate = (item: IMenuItem) => {
  + if (item && item.active) {
  + return item.expanded ? item.collapse() : item.expand();
  + }
  +
  this.props.menu.activateAndScroll(item, true);
  setTimeout(() => {
  if (this._updateScroll) {
  