I'm adding a bunch of items in my store, in bulk. I'm clicking add, add, add, add, add--OOPS I didnt want that one. I click the checkmark--uhhh no way to undo. Now, I know this window shows me stuff I already have added also. And it might not make sense to delete those from here (then again, it might)--so what's the difference between un-adding, and deleting? I don't know. I'm not sure I have a good suggestion here. I'm just reporting that it's unpleasant to have what feels like checking a bunch of checkboxes be irrevocable.