refactor, improve code according to suggestions

src/app/notifications/notifications-effects.ts

@@ -0,0 +1,7 @@
+import { QualityAssuranceSourceEffects } from './qa/source/quality-assurance-source.effects';
+import { QualityAssuranceTopicsEffects } from './qa/topics/quality-assurance-topics.effects';
+
+export const notificationsEffects = [
+  QualityAssuranceTopicsEffects,
+  QualityAssuranceSourceEffects
+];