fallback to menuItemColor if pressedColor is null on pressed state on MenuItemWidget

lib/ui/components/menu_item_widget.dart

@@ -166,7 +166,7 @@ class _MenuItemWidgetState extends State<MenuItemWidget> {
 
   void _onTapDown(details) {
     setState(() {
-      menuItemColor = widget.pressedColor;
+      menuItemColor = widget.pressedColor ?? widget.menuItemColor;
     });
   }