CI: Minimum Order Amount Setting

[WillStrohl]

Reference: https://hotcakes.org/Forums/g/posts/t/194/Minimum-Order-Amount

There is a built-in setting that allows a store owner to set the minimum order amount required before a customer is allowed to check out. There isn't a matching UI to configure this setting though.

This issue will add this UI element to the Admin: Order view.

Other Requirements:

• The UI will warn the customer that they can't check out because the minimum order amount hasn't been reached yet. They will be told what that amount is. This will be done as a message on the top of the cart view.
• The cart button will be disabled until the minimum order amount is reached (requires viewset updates).
• There will be a built-in action delegate integration to further enforce this, in the event that someone tries to directly go to the check out page, or a direct checkout link is used from another view.