Feature/datagrid patch

replaced contenteditable with input fields
changed add row to top or bottom of the list (configuration)
added listen now on click event (problem with focusevent and validation)
....

- [x] finish the code
- [ ] gather feedback for my changes
- [ ] submit changes to the documentation


| Q             | A
| ------------- | ---
| Bug fix?      | yes
| New feature?  | yes
| Tests pass?   | none
| Fixed tickets | none
| Doc           | none

needed to show validation styles for new rows https://github.com/massiveart/husky-validation/issues/19