fix #43 - update opened menu if it is changed while opened

Author: sodik82

src/Menu.js

@@ -38,8 +38,10 @@ export default class Menu extends Component {
   }
 
   componentDidUpdate() {
-    debug('component did update', this._name);
-    this.context.menuActions._notify();
+    // force update if menu is opened as its content might have changed
+    const force = this._isOpen();
+    debug('component did update', this._name, force);
+    this.context.menuActions._notify(force);
   }
 
   componentWillUnmount() {

src/MenuContext.js

@@ -27,7 +27,7 @@ export default class MenuContext extends Component {
       closeMenu: () => this.closeMenu(),
       toggleMenu: name => this.toggleMenu(name),
       isMenuOpen: () => this.isMenuOpen(),
-      _notify: () => this._notify()
+      _notify: force => this._notify(force)
     };
     const menuRegistry = this._menuRegistry;
     return { menuRegistry, menuActions };