Boxie theme cart pulldown from main nav doesn't like a lot of cart items

Items fall down below the bottom of the page but it isn't scrollable and there is no way to see the subtotal, or choose to checkout/view cart page.

[tomcornall]

Looks like this finally got caught by a customer: https://app.intercom.io/a/apps/7236196445273cea007287c0c90a2f0d598567cc/inbox/tom@lemonstand.com/conversations/4579716707

[af19]

This'll fix it.

    @media (min-width: 768px ) {
        #mini-cart {
            max-height: 600px;
            overflow-y: scroll;
    }