- When a new element is added, this config is used
 - The default-config is in the configuration yaml file

But it can't yet be shown because there is no config in it.

 - DELETE is based on the URI (elements/{id})
 - POST on /elements

 - Let Jackson serialize BSON document
 - Use the same code to return workspace elements

- Add new style

 - Always use workspaces and elements with an S
 - Provide an endpoint to get all workspaces

Also do not put the workspace in its configuration

- Hide label when < md
- Delete flex bug on toolbar
- Add @media screens