Bug - Fixed Store repricing problem

I was repricing an item (A) right after adding another item (B). I think B might not have made it onto the store yet, when I was typing the price

Apparently, this caused the price on A to jump onto another item. Unluckily, this happens to be the Mr. A. And so, I sold 2 Mr. A at 2.5k.

I hope there's something that will prevent it from happening again.

Revision 10290 cancels table editing in the Store Manage Frame whenever you add or delete something from the Sold Item List.