UI: Fix frontend API cleanup/exit event order

Makes it so that the exit event is always called regardless of save
state, and that exit is always called after cleanup rather than before.

UI/api-interface.cpp

@@ -645,7 +645,8 @@ struct OBSStudioAPI : obs_frontend_callbacks {
 	void on_event(enum obs_frontend_event event) override
 	{
 		if (main->disableSaving &&
-		    event != OBS_FRONTEND_EVENT_SCENE_COLLECTION_CLEANUP)
+		    event != OBS_FRONTEND_EVENT_SCENE_COLLECTION_CLEANUP &&
+		    event != OBS_FRONTEND_EVENT_SCENE_COLLECTION_EXIT)
 			return;
 
 		for (size_t i = callbacks.size(); i > 0; i--) {