Add Confirmation and Price Context When Listing to Dropbox

<@360641650378276865> You asked a question in game chat. I think yes, a confirmation may be good for adding items to the dropbox. Something like. "You are listing 10 Pumpkin Bread for 0.02 Gold each. OK?" or in the price field "Other listings for this item from 0.02 to 0.15 Gold". Todays goof was my fault for adding to my drop box without wearing glasses. LOL. Thankful @hasishi was willing to sell them back to me.