allow enabeling Network Multiplayer through CMake flags

CMakeLists.txt

@@ -19,6 +19,7 @@ option(USE_WIIUSE "Support for wiimote input devices" ON)
 option(USE_FRIBIDI "Support for right-to-left languages" ON)
 option(CHECK_ASSETS "Check if assets are installed in ../stk-assets" ON)
 option(USE_SYSTEM_ANGELSCRIPT "Use system angelscript instead of built-in angelscript. If you enable this option, make sure to use a compatible version." OFF)
+option(ENABLE_NETWORK_MULTIPLAYER "Option description" OFF)
 
 if(MSVC AND (MSVC_VERSION LESS 1900))
     # Normally hide the option to build wiiuse on VS, since it depends
@@ -195,6 +196,11 @@ if(UNIX AND NOT APPLE)
     endif()
 endif()
 
+# Netwowk Multiplayer
+if(ENABLE_NETWORK_MULTIPLAYER)
+  add_definitions(-DENABLE_NETWORK_MULTIPLAYER_SCREEN)
+endif()
+
 # Set some compiler options
 if(UNIX OR MINGW)
     set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=gnu++0x")

src/states_screens/main_menu_screen.cpp

@@ -494,9 +494,12 @@ void MainMenuScreen::eventCallback(Widget* widget, const std::string& name,
         if (PlayerManager::getCurrentOnlineId())
         {
             // For 0.8.2 disable the server menu, instead go to online profile
-            //OnlineScreen::getInstance()->push();
+            #ifdef ENABLE_NETWORK_MULTIPLAYER_SCREEN
+            OnlineScreen::getInstance()->push();
+            #else
             ProfileManager::get()->setVisiting(PlayerManager::getCurrentOnlineId());
             TabOnlineProfileAchievements::getInstance()->push();
+            #endif
         }
         else
         {