fix: org unit notification type enum and info on admin notification page

...fication-form/admin-notification-form.presentational.html

...tification-form/admin-notification-form.presentational.ts

...min-notification-list/admin-notification-list.routable.ts

...t/preservation-space-notification-detail-edit.routable.ts

...ion-list/preservation-space-notification-list.routable.ts

...l-edit/preservation-space-orgunit-detail-edit.routable.ts

.../orgunit-list/preservation-space-orgunit-list.routable.ts

src/app/models/index.ts

src/app/shared/enums/notification-type.enum.ts