Dk/17 config page complex

[darenkeck-dev]

This completes a lot of the functionality of #17. I'd like to get the current progress merged as it will make working on different pages in parallel easier.

The following items still need to be completed before closing #17:

• click “discard” to delete the configuration (which removes the configuration from the system)
• the new button to 'duplicate' the current open config
• tabs are not shown
• clicking '+ new configuration' on the config page does not show a blank entry ready to enter the config name
• don't allow the first config to be deleted

I'll plan on working on those while updating the CSS for both the config and EditConfig modal.

[darenkeck-dev]

Though they'll definitely be updates to our intermediate data structure, this PR will close #13.

[darenkeck-dev]

Screenshots for documentation: