More refactoring + reusing the server's store on the client

src/app/core/shared/generic-constructor.ts

@@ -0,0 +1,7 @@
+/**
+ * ensures we can use 'typeof T' as a type
+ * more details:
+ * https://github.com/Microsoft/TypeScript/issues/204#issuecomment-257722306
+ */
+export type GenericConstructor<T> = { new (...args: any[]): T };
+