text: Title: Button labels in add to cart widget
  Body: We have three buttons there at the moment:
  
  * Show Cart
  * Continue Shopping
  * Cancel
  
  Instead of "Show Cart", I suggest something like "Go to checkout".
  
  "Cancel" is misleading. It just takes the user back to the product page. I'd expect it to cancel the add-to-cart oprtation, but that is not what it does. Do we need this button at all?
  
  "Continue Shopping" redirects to the product's category. It seems less surprising to me to return the user to the product page instead.