Copying elements in the nested view in the management does not keep the parent element

### Expected behaviour / Erwartetes Verhalten

The copied element should end up in the same catalog/section/page/... as the original.

### Implementation

I think we just need to add a parent prop for all components in `rdmo/management/assets/js/components/element` and set it when nesting them. The rest can be done like for `createElement` action.
