### Godot version

4.1.1

### System information

linux

### Issue description

- When favoriting a path in a `FileDialog`, clicking on it travels to `path/to/dir/`.
- When going up a level from there, it doesn't go to `path/to` but to `path/to/dir` (without the `/`).

[simplescreenrecorder-2023-08-18_09.38.37.webm](https://github.com/godotengine/godot/assets/71937306/00c20ad3-292f-4961-84ed-dbc64906df52)

The problem is either (or both) that:
 - loaded path has a trailing `/`
 - parent dir of `stuff/` is considered to be `stuff`

### Steps to reproduce

favorite a directory and use the feature to navigate to it

### Minimal reproduction project

any (i.e. the project manager's "new project" dialog has one)
}
		} else if (!dir_access->current_is_hidden()) {
			String full_path = cdir == "res://" ? item : dir_access->get_current_dir() + "/" + item;
			if (dir_access->current_is_dir() && (Engine::get_singleton()->is_project_manager_hint() || !EditorFileSystem::_should_skip_directory(full_path))) {
				dirs.push_back(item);
			} else {
				files.push_back(item);
			}
		}
		item = dir_access->get_next();
	}
	dirs.sort_custom<NaturalNoCaseComparator>();
	files.sort_custom<NaturalNoCaseComparator>();
	while (!dirs.is_empty()) {
		const String &dir_name = dirs.front()->get();
		item_list->add_item(dir_name);
		if (display_mode == DISPLAY_THUMBNAILS) {
			item_list->set_item_icon(-1, folder_thumbnail);
		} else {
			item_list->set_item_icon(-1, theme_cache.folder);
		}
		Dictionary d;
		d["name"] = dir_name;
		d["path"] = cdir.path_join(dir_name);
		d["dir"] = true;
		item_list->set_item_metadata(-1, d);
		item_list->set_item_icon_modulate(-1, theme_cache.folder_icon_color);
		dirs.pop_front();
	}
	List<String> patterns;