Improve discount output
in the templates we use following snippet:
{if 'percent' == $item.item_discount_type}
{$item.item_discount}%
{else}
{$core.config.coupon_item_price_currency}{$item.item_discount|string_format:"%.2f"}
{/if}
improve this to be usable as simple as: $item.discount
or something
Also: get rid of currency symbol config and use currency item