Working on loading screen

src/MenuManager.h

@@ -79,6 +79,13 @@ namespace ZL {
 		std::function<void(int)> onLoadGame;
 		std::function<SaveSlotInfo(int)> getSlotInfoFunc;
 
+		// Set by Game: runs the given closures one per frame with the loading
+		// screen shown (same mechanism as the initial resource load), so a heavy
+		// operation like reloadLocalizedGameContent() doesn't block the window
+		// for its whole duration. Game re-enables normal rendering once all the
+		// closures have run.
+		std::function<void(std::vector<std::function<void()>>)> runAsLoadingSequence;
+
 		// Called when a chat message bubble should be shown (text + direction)
 		void onChatBubbleReady(const std::string& text, bool incoming);