### 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)
bool res = (access == ACCESS_RESOURCES);
	String cd = get_current_dir();
	if (!cd.ends_with("/")) {
		cd += "/";
	}
	Vector<String> favorited = EditorSettings::get_singleton()->get_favorites();
	bool found = false;
	for (int i = 0; i < favorited.size(); i++) {
		bool cres = favorited[i].begins_with("res://");
		if (cres != res) {
			continue;
		}
		if (favorited[i] == cd) {
			found = true;
			break;
		}
	}
	if (found) {
		favorited.erase(cd);
	} else {
		favorited.push_back(cd);
	}
	EditorSettings::get_singleton()->set_favorites(favorited);
	_update_favorites();
}
void EditorFileDialog::_update_recent() {