UltimateShop

• Added hide-message option in product config section.
• Added force-display-fail-message option in config.yml file. Default to false.

By default, we will auto force display fail message to make sure player know whether they have successfully clicked the product button. If set to false, we will not force display fail message and you can also use hide-message option in shop configs to hide the fail messages.

• Added math support in placeholder condition.