Method GetSelectedClass

src/town_gui.cpp:1501–1501

	void Close([[maybe_unused]] int data) override { ResetObjectToPlace(); }

	int GetSelectedClass() const override { return HousePickerCallbacks::sel_class; }
	void SetSelectedClass(int cls_id) const override { HousePickerCallbacks::sel_class = cls_id; }

	StringID GetClassName(int id) const override