No problem, I have a feeling if something like that were added, I would probably be more likely to add stuff to my collections (after stuffing a copy in my gallery!

I'm in favour of adding the "Add to Wardrobe/Collection" button to event shops. I wouldn't want it to be an actual pop-up, though, since I hold ctrl and buy a whole set of items at once and having a pop-up would really cramp my style.