Refactor / fix cluster view visibility (#2654)

Signed-off-by: Jari Kolehmainen <jari.kolehmainen@gmail.com>

src/renderer/api/catalog-entity-registry.ts

@@ -5,6 +5,7 @@ import "../../common/catalog-entities";
 
 export class CatalogEntityRegistry {
   @observable protected _items: CatalogEntity[] = observable.array([], { deep: true });
+  @observable protected _activeEntity: CatalogEntity;
 
   constructor(private categoryRegistry: CatalogCategoryRegistry) {}
 
@@ -39,6 +40,14 @@ export class CatalogEntityRegistry {
     });
   }
 
+  set activeEntity(entity: CatalogEntity) {
+    this._activeEntity = entity;
+  }
+
+  get activeEntity() {
+    return this._activeEntity;
+  }
+
   get items() {
     return this._items;
   }