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/DisconnectedScreen.cpp

@@ -9,7 +9,7 @@ DisconnectedScreen::DisconnectedScreen(const wstring& title, const wstring reaso
     Language *language = Language::getInstance();
 
     this->title = language->getElement(title);
-    if (reasonObjects != nullptr)
+    if (reasonObjects != NULL)
 	{
         this->reason = language->getElement(reason, reasonObjects);
     }