Show object content instead of object headers

[mgeisler]

Right now we show the object headers when you navigate to #/container/object. It would be better to show the content and move the headers to a modal.

This would have the advantage that you see the object content directly when you click an object and it would also allow us to use more space for showing the content. Today, the modal showing the content is quite small and only shows 20 lines.