This reverts commit 8d7c3f4b.

- person icon
- public administration icon

- person icon
- public administration icon

- external unit icon
- mailbox icon

- user icon
- users icon

- undo request vorgang deletion icon
- update icon

- statistic icon
- undo icon

- settings icon
- stamp icon

- search icon
- send icon

- request vorgang deletion icon
- save icon

- orga unit icon
- plus icon

- office icon
- open link icon

- logout icon
- more icon

refactor E2E test

See merge request !110

- help icon
- info icon

- exclamation icon
- forward vorgang icon

- edit icon
- error icon

- delete vorgang finally icon
- discard vorgang icon