(8fed20401) Fixed the "mysteries lie ahead" popup opening multiple times when clicking the icon at the center of the map

Barotrauma/BarotraumaClient/Source/Map/Map/Map.cs

@@ -624,7 +624,9 @@ namespace Barotrauma
 
                 if (mouseOn && PlayerInput.LeftButtonClicked() && !messageBoxOpen)
                 {
+                    //TODO: translate or replace
                     var messageBox = new GUIMessageBox("Mysteries lie ahead...", "This area is unreachable in this version of Barotrauma. Please wait for future updates!");
+                    messageBoxOpen = true;
                     CoroutineManager.StartCoroutine(WaitForMessageBoxClosed(messageBox));
                 }
             }