project_panel: Don't show file icon during rename when file icons are otherwise hidden (#12910)

This PR fixes an instance where the file icon for a project panel entry
would be shown during a rename even when the `project_panel.file_icons`
setting was set to `false`.

Resolves #12905.

Release Notes:

- Fixed an issue where file icons were displayed in the project panel
during a rename even when `project_panel.file_icons` was set to `false`
([#12905](https://github.com/zed-industries/zed/issues/12905)).