Context Pane Media Previews

Normally, the contents of the pane are limited to details about playpens or what’s inside them. But since ideas can link to external documents, it can be useful to see previews of these while exploring ideas.

So, for ideas with previewable content, when the context pane is enlarged to be over half of the available width, a preview will appear in the pane. Shrinking the pane will restore the pane’s usual contents.