Update settings to be connection-specific

[jeffpaul]

Is your enhancement related to a problem? Please describe.
In the future, it might make sense to make these settings Connection specific, expanding Connection settings.

Describe the solution you'd like
Essentially move the Images and Author byline sections into Connection Settings.

Designs
https://cldup.com/ExfxTPujeN.png

Describe alternatives you've considered

Additional context
Relates to #256.

Props GH:@oszkarnagy / WP:@oszkarnagy for the UX analysis and recommendation.