Allow managers to copy/export a server configuration from the Server Manager

[cjhenck]

Managers may want to:

1. Use the automated setup experience to configure a server, then disconnect OAuth while retaining server access; or
2. Provide management access to a single server to another individual without providing access to their cloud account; or
3. Long after manual setup, move to a manager on another device

In order to support all of these use cases, I propose allowing managers to copy/export a server configuration from within the manager tool.

[cjhenck]

Additional request:

• Bulk export & bulk import of all server configurations for backup purposes.

Since bulk export doesn't seem as critical for cloud providers, one option would be to add it to the overflow menu for each section (cloud provider, manual servers, etc)

I think this could be something that a community member could contribute by exporting the config json in an array in a json file.