Being able to apply the same extra field group to an item multiple times.

Id like the see when you click the Extra Field tab from with in the item, an apply/save button. See Photoshop mockup. Pressing Save & New would save the first field and create a new one right below, or if it hasnt been changed pressing new would just add a new extra field.

URL having a tracker too would be very nice, so now K2 could replace the core component weblinks.