Add Import Container to the Manage Containers screen

[Stan-vw]

Currently, exported container JSON files can only be imported in an existing container's Version screen. This means that to add a new container that is a duplicate of an old container, you must take these steps:

1. On the Manage Containers screen, click create a new container
2. Name the container
3. For this container, open the configuration
4. Go to versions screen
5. Click on Import
6. add the JSON file and click "overwrite"

Suggested workflow:

1. on the Manage Containers screen, click Import container (opens screen as mocked up attached
2. name the container
3. add the JSON file, and click Import.

While the sequence of required steps is "only" 3 steps shorter (a 50% reduction though), it simplifies the workflow by a lot. It's possible that many users are not familiar with this feature, because it's somewhat hidden away in the versions screen.
My suggestion would be to maintain the current functionality as well, as it still allows people to overwrite existing containers which can be helpful for other use cases (such as restoring a backup).