DEAR MISS MANNERS: I was raised right and know my forks and honorifics, but it seems some rules may have changed. I find myself frequently unsure whether something is a gift, in which case I’d simply say “thank you,” or if I should offer reimbursement. To wit: A close friend’s daughter was traveling to a European city in which I’d lived years ago. The daughter texted me and asked if I’d like to have something from there. I said “why, yes,” and she brought me the item I requested. Gift or reimburse? Does it matter that the daughter is a college student and was traveling on a scholarship?I’m tra…