[Bug] ManyToOne relation in combo display mode doesn't respect path formatter

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A many-to-one relation field in grid display mode respects the path formatter.

When you switch to the combo display mode, the full path is displayed.

[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.

[blankse]

Is fixed by #645