### Godot version

v4.2.dev3.official [013e8e3af]

### System information

Windows 11, Core i5-12400F, RX 6600

### Issue description

TileSet->Setup->Separation maybe should have "px" like rest?
![Screenshot 2023-08-21 162202](https://github.com/godotengine/godot/assets/962340/3c6b9a97-7520-4610-8153-7882cc9c303f)
I know this is pixels from testing it.

TileSet->Select is this Animation Separation "px" too? idk
![Screenshot 2023-08-21 162131](https://github.com/godotengine/godot/assets/962340/fcb580e3-9ff7-41d8-92d3-e585841d3803)
I tried setting up animation separation and got a not enough room error, so maybe not "px". idk


Thanks.


### Steps to reproduce

- open TileSet->Setup->Separation, note some have "px" and one doesn't
- open TileSet->Select, is this separation "px" too?


### Minimal reproduction project

n/a
return source_id;
}
bool TileSetAtlasSourceEditor::TileSetAtlasSourceProxyObject::_set(const StringName &p_name, const Variant &p_value) {
	if (p_name == "id") {
		set_id(p_value);
		return true;
	}
	String name = p_name;
	if (name == "name") {
		
		name = "resource_name";
	}
	bool valid = false;
	tile_set_atlas_source->set(name, p_value, &valid);
	if (valid) {
		emit_signal(SNAME("changed"), String(name).utf8().get_data());
	}
	return valid;
}
bool TileSetAtlasSourceEditor::TileSetAtlasSourceProxyObject::_get(const StringName &p_name, Variant &r_ret) const {