OZG-2626 OZG-2886 show email settings if link exists

...on/src/lib/header-container/header-container.component.ts

goofy-client/libs/test-utils/src/lib/helper.ts

...settings-container/user-settings-container.component.html

...tings-container/user-settings-container.component.spec.ts

...r-settings-container/user-settings-container.component.ts

...igung/user-settings-email-benachrichtigung.component.html

...ng/user-settings-email-benachrichtigung.component.spec.ts

...htigung/user-settings-email-benachrichtigung.component.ts

goofy-client/libs/user-settings/src/test-setup.ts