Revert "Took out the fix for #4527 again, this is handled in the TopL…

…evelFrame class now"

We seem to need it after all.

This reverts commit 17174ac.

plugins/uimanager/menu/MenuManager.cpp

@@ -184,6 +184,23 @@ void MenuManager::handleElementAdded(const MenuElementPtr& element)
 		parentMenu->setNeedsRefresh(true);
 	}
 
+#ifdef __linux__
+	// In Linux, we don't receive the wxEVT_MENU_OPEN event on the MenuFolder
+	// Option 1 is to add the event handler to the wxFrame housing the wxMenuBar
+	//          but we don't always know what wxFrame that is (it's added later)
+	// Option 2 is to mark the whole menu as "needs refresh" => let's go with this
+    while (parentMenu)
+    {
+    	if (std::dynamic_pointer_cast<MenuBar>(parentMenu))
+    	{
+    		std::static_pointer_cast<MenuBar>(parentMenu)->setNeedsRefresh(true);
+    		break;
+    	}
+
+    	parentMenu = parentMenu->getParent();
+    }
+#endif
+
 	// When inserting a new menu in a menubar, make sure it is constructed
 	if (element->getParent() &&
 		std::dynamic_pointer_cast<MenuBar>(element->getParent()) &&