In the Europe panel, if you rightclick a good on the bottom, there is a context menu which shows 2 entries: One for the Colopedia, and a small one that is empty for some reason. If you click on it, you buy this good.
It seems the text for the context menu was forgotten here.
Version: 0.13.0+dev, commit cb10784763ce2a594dc5333ba83a56e197bc4e19
Never noticed that... I always just drag the goods. Fixed in git.6f399d4.
Fix confirmed.