OZG-400 user-icon refactoring

...ng-forwarding-info/vorgang-forwarding-info.component.html

...ion/src/lib/header-container/header/header.component.html

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

...ib/user-icon-container/user-icon-container.component.html

.../lib/user-icon-container/user-icon-container.component.ts

...s/user-profile/src/lib/user-icon/user-icon.component.html

...s/user-profile/src/lib/user-icon/user-icon.component.scss

...ibs/user-profile/src/lib/user-icon/user-icon.component.ts

...y-client/libs/user-profile/src/lib/user-profile.module.ts

...g-list/vorgang-list-item/vorgang-list-item.component.html

...g-list/vorgang-list-item/vorgang-list-item.component.scss