Revert "Project modernization (#630)"

This code was not tested and breaks in Release builds, reverting to restore
functionality of the nightly. All in-game menus do not work and generating
a world crashes.

This reverts commit a9be52c41a.

Minecraft.Client/Common/Tutorial/Tutorial.h

@@ -139,9 +139,9 @@ public:
 	bool getCompleted( int completableId );
 
 #ifdef _XBOX
-	void changeTutorialState(eTutorial_State newState, CXuiScene *scene = nullptr);
+	void changeTutorialState(eTutorial_State newState, CXuiScene *scene = NULL);
 #else
-	void changeTutorialState(eTutorial_State newState, UIScene *scene = nullptr);
+	void changeTutorialState(eTutorial_State newState, UIScene *scene = NULL);
 #endif
 	bool isSelectedItemState();