Feature/header

new header component to replace the edit toolbar

- [ ] test coverage
- [x] finished the code
- [ ] gathered feedback for my changes
- [ ] submited changes to the documentation


| Q             | A
| ------------- | ---
| Bug fix?      | [yes|no]
| New feature?  | [yes|no]
| Tests pass?   | [yes|no|none]
| Fixed tickets | [yes|no|none]
| Doc           | [url to doc|none]