OZG-1194 OZG-1653 e2e

...fy-e2e/src/components/anhang/anhang-list.e2e.component.ts

...2e/src/components/postfach/postfach-mail.e2e.component.ts

.../postfach-mail/postfach-nachricht-attachments.e2e-spec.ts

goofy-client/apps/goofy-e2e/src/model/binary-file.ts

...-client/apps/goofy-e2e/src/model/vorgang-attached-item.ts

.../goofy-e2e/src/page-objects/postfach-mail.component.po.ts

goofy-client/apps/goofy-e2e/src/support/linkrels.ts