New keyword field

I would like to see a new keyword field added when you add a coin. So that is a coin is a pattern, I can write "Pattern, Trial strike, Off-metal" things like that. It would be invisible when you view the coin sheet, but can be used to search. For Italian states, there are some coins that are called "Ducato", even though the same coin is sometimes called "Ducatone". Right now, I write in the written value field "1 Ducato = 1 Ducatone", but it looks bad on the main coin page. Thumbs up!