project_panel: Fixed open in split not working in project panel (#14535)

Release Notes:

- Fixed `cmd-double click` in project panel not opening a split view ([14465](https://github.com/zed-industries/zed/issues/14465))
ef20afa9a4CharlesChen0823 committed on 7/16/2024, 6:17:58 AM· committed by GitHubparente413823
1 file changedLine totals unavailable