ControllerInterface: Remove OSX window handle

also make it more thread safe (avoid rare deadlock)
and fix it trying to add devices before the CI has init

Source/Core/InputCommon/ControllerInterface/ControllerInterface.h

@@ -116,6 +116,7 @@ private:
 
   std::list<std::function<void()>> m_devices_changed_callbacks;
   mutable std::recursive_mutex m_devices_population_mutex;
+  mutable std::mutex m_pre_population_mutex;
   mutable std::mutex m_callbacks_mutex;
   std::atomic<bool> m_is_init;
   // This is now always protected by m_devices_population_mutex, so