Reintroduces options selection for the Mac.

For everything except the Vic-20, anyway. That has a somewhat outdated notion of what an options panel should be, corresponding to the work yet to do on its analyser.

Analyser/Dynamic/MultiMachine/MultiMachine.hpp

@@ -45,9 +45,11 @@ class MultiMachine: public ::Machine::DynamicMachine, public MultiCRTMachine::De
 		JoystickMachine::Machine *joystick_machine() override;
 		KeyboardMachine::Machine *keyboard_machine() override;
 		Configurable::Device *configurable_device() override;
+		void *raw_pointer() override;
 
 		void multi_crt_did_run_machines() override;
 
+
 	private:
 		std::vector<std::unique_ptr<DynamicMachine>> machines_;
 		std::mutex machines_mutex_;