[PM-7278] Fix undefined reference to `keyManager` within `menu-trigger-for` directive (#8614)

libs/components/src/menu/menu-trigger-for.directive.ts

@@ -88,12 +88,12 @@ export class MenuTriggerForDirective implements OnDestroy {
       }
       this.destroyMenu();
     });
-    this.menu.keyManager.setFirstItemActive();
-    this.keyDownEventsSub =
-      this.menu.keyManager &&
-      this.overlayRef
+    if (this.menu.keyManager) {
+      this.menu.keyManager.setFirstItemActive();
+      this.keyDownEventsSub = this.overlayRef
         .keydownEvents()
         .subscribe((event: KeyboardEvent) => this.menu.keyManager.onKeydown(event));
+    }
   }
 
   private destroyMenu() {