Feature Request: Better Filtering Controls for Sandbox List

[jezell]

ECS allows filtering instances by status. When dealing with large numbers of sandboxes this would really help. If you need to get a list of just the running sandboxes for example, that's rather hard to do with the current API since you'd have to enumerate to the end of the list to ensure you get everything:

See:
https://docs.aws.amazon.com/AmazonECS/latest/APIReference/API_ListContainerInstances.html

ECS also has some settings like max results. It's hard to tell from the modal client interface whether the async iterator continues to fetch new pages transparently or fetches them all at once. A limit parameter would also be a nice addition to make it more clear that you explicitly only want N number of results.