Ability to filter out or hide completed and rejected ideas from the roadmap.

I like how the roadmap is coming along, and I look forward to seeing this site grow. But as it does so, we're going to have plenty of items on the roadmap that are either completed or that end up getting rejected.

While I don't think it's a bad idea to be able to see these (perhaps for historical reasons or just to satisfy curiosity) I think the normal use case will be people wanting to see, discuss, and vote on items that are under consideration or in the pipeline. If there are a lot of rejected or completed items in the mix, it will be hard to find the ones that it makes sense to vote on.

There should be a way to filter out these completed or rejected ideas, and we should consider if filtering them out should be the default.