[Bug] Display mode is reset when cloning a many-to-one relation

[limenet]

Steps to reproduce

1. Create a data object class
2. Add a many-to-one relation, let's call it r1
3. Set the display mode to "Inline Search"
4. Save class
5. Clone r1, let's call it r2

Actual behavior

1. r2 has display mode "Display path reference"

Expected behavior

1. r2 has display mode "Inline Search"

[github-actions]

Thanks a lot for reporting the issue. We did not consider the issue as "Pimcore:Priority", "Pimcore:ToDo" or "Pimcore:Backlog", so we're not going to work on that anytime soon. Please create a pull request to fix the issue if this is a bug report. We'll then review it as quickly as possible. If you're interested in contributing a feature, please contact us first here before creating a pull request. We'll then decide whether we'd accept it or not. Thanks for your understanding.