Feature request: Mark cocktail with "is_done" flag

[mostepunk]

Hi! I have one more idea :)

It would be nice to have a flag if I made some cocktail or not. For example I made some cocktail and mark it as "is_done=true" in checkbox. And some day I want to taste some new cocktail, that I have never tried before and add to filter "is_done=false".

I think it would be nice feature. P.S. Sorry for my broken English :)