This pretty plant just popped up it seems a few weeks ago with its little purple flowers. Today it is spread way out and has green berries-some of which have turned red. I am wondering if this is a true keeper or a weed? If it is a weed are the berries good for the birds or squirrels-if they are I would move it to an isolated spot instead of getting rid of it completely. Thank-you to all you smarties out there.