OZG-7773 mail timing issue

...libs/navigation-shared/src/lib/navigation.service.spec.ts

...ient/libs/navigation-shared/src/lib/navigation.service.ts

.../postfach-mail/outgoing-mail/outgoing-mail.component.html

...stfach-mail/outgoing-mail/outgoing-mail.component.spec.ts

...st/postfach-mail/outgoing-mail/outgoing-mail.component.ts

...d-button/mail-unread-button-link-container.component.html

...utton/mail-unread-button-link-container.component.spec.ts

...ead-button/mail-unread-button-link-container.component.ts

...nt/libs/vorgang-shared/src/lib/vorgang-navigation.util.ts