### 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
if (!tile_set_atlas_source.is_valid()) {
		return false;
	}
	if (p_name == "id") {
		r_ret = get_id();
		return true;
	}
	String name = p_name;
	if (name == "name") {
		
		name = "resource_name";
	}
	bool valid = false;
	r_ret = tile_set_atlas_source->get(name, &valid);
	return valid;
}
void TileSetAtlasSourceEditor::TileSetAtlasSourceProxyObject::_get_property_list(List<PropertyInfo> *p_list) const {
	p_list->push_back(PropertyInfo(Variant::NIL, TTR("Atlas"), PROPERTY_HINT_NONE, String(), PROPERTY_USAGE_CATEGORY));
	p_list->push_back(PropertyInfo(Variant::INT, PNAME("id"), PROPERTY_HINT_RANGE, "0," + itos(INT_MAX) + ",1"));
	p_list->push_back(PropertyInfo(Variant::STRING, PNAME("name")));
	p_list->push_back(PropertyInfo(Variant::OBJECT, PNAME("texture"), PROPERTY_HINT_RESOURCE_TYPE, "Texture2D"));
	p_list->push_back(PropertyInfo(Variant::VECTOR2I, PNAME("margins"), PROPERTY_HINT_NONE, "suffix:px"));
	p_list->push_back(PropertyInfo(Variant::VECTOR2I, PNAME("separation")));
	p_list->push_back(PropertyInfo(Variant::VECTOR2I, PNAME("texture_region_size"), PROPERTY_HINT_NONE, "suffix:px"));
	p_list->push_back(PropertyInfo(Variant::BOOL, PNAME("use_texture_padding")));
}
void TileSetAtlasSourceEditor::TileSetAtlasSourceProxyObject::_bind_methods() {