[BUGFIX] fixed issues with to long values for select

__Tasks:__
- [x] got feedback

__Informations:__

| Q             | A
| ------------- | ---
| Bug fix?      | yes
| New feature?  | no
| Tests pass?   | none
| Fixed tickets | none
| Doc           | none
| BC           | set the important attribute for the hidden-class in utils.scss - should not break anything but can't be 100% sure

__TODO:__
- update admin bundle