Hi, just to add to this I just had a customer call to ask about adding multiple items. They just wanted to be able to click multiple times to add more product to the cart but with the html5 template once clicked the button says 'added to cart' then if clicked again takes you to the cart (where they can increase quantity). This behaviour annoyed my customer.
I also notice there is a little x in the corner of the price tag once a product is added a per the above scenario. clicking on this little x does nothing but if I inspect the element in my browser it shows as <button class="close" data-dismiss="alert" type="button"> which seems to indicate that the button should be 'dismissed' and return to normal??
Anyway, I still think it would be great if in grid view the customer can either have a quantity option or be able to click the button multiple times to add more product to the cart.