[ACA-1830] create menu enhancements (#670)

* nested menus for create button

* evaluate sub-menu permissions

* demo plugin

* "create library" action

* unit tests and proper effect name

src/app/components/create-menu/create-menu.component.ts

@@ -52,6 +52,9 @@ export class CreateMenuComponent implements OnInit, OnDestroy {
   @Input()
   showLabel: boolean;
 
+  @Input()
+  expanded: boolean;
+
   constructor(
     private store: Store<AppStore>,
     private extensions: AppExtensionService