[WIP] [FEATURE] Content Type image selection

Content Type image selection:

__Tasks:__

- [ ] test coverage
- [ ] gather feedback for my changes
- [ ] submit changes to the documentation
- [ ] content type and container
- [ ] service configuration
- [ ] template
- [ ] javascript integration


__Informations:__

| Q             | A
| ------------- | ---
| Bug fix?      | no
| New feature?  | yes
| Tests pass?   | yes
| Fixed tickets | none
| Doc           | url to commit