[HOTFIX] Added deepcopy by passing data fixes tab save issues

__Tasks:__

- [ ] gather feedback for my changes

__Informations:__

| Q             | A
| ------------- | ---
| Tests pass?   | yes
| Fixed tickets |  https://github.com/sulu-cmf/sulu-standard/issues/207, https://github.com/sulu-cmf/sulu-standard/issues/208 (should both be tested)
| BC Breaks     | none
| Doc           | none