#payment Give more visual feedback when a subscription is added to the cart/basket

[runboxdave]

Give more visual feedback when a subscription is added to the cart/basket as it isn't always obvious what is going on when you click renew and drawing attention to the cart/basket would indicate that it's relevant and is where you go next to pay.

[gtandersen]

@runboxdave Agreed; could be done in connection with #1433.