Disallow changing menu option while in info panel

src/game/Level.cpp

@@ -803,9 +803,12 @@ void Level::handleMenuActiveEvents(Engine& engine, SDL_Event& event)
             m_showUnitInfoMenu = false;
         }
         if (event.key.keysym.sym == SDLK_UP || event.key.keysym.sym == SDLK_DOWN)
+        {
+            if (!m_showUnitInfoMenu)
             {
                 m_contextMenu.handleEvent(engine, event);
             }
+        }
         if (event.key.keysym.sym == SDLK_RETURN)
         {
             std::string cmd = m_contextMenu.getSelectedOption();