Selecting one element in trade screen goes through plural item popup

[Former user]

Current behaviour: I have a single bronze dagger in my inventory. In trade screen, I click on it to select for trading. I get a popup to specify number of items I want to select.

Suggested behaviour: I have a single bronze dagger in my inventory. In trade screen, I click on it to select for trading. Dagger gets marked for trading without any additional interactions.

Possible further improvements: Replace abovementioned popup with plus and minus buttons on rows with plural items. There's no need for additional confirmation in a separate popup as trading won't occur until trade button is pressed anyway.