Add a document footer for response metadata and to equalize whitespace inside window

[emilis]

I use the line width -1. I have a lot of whitespace on the sides of the page content.

It would look better if there was more whitespace below the page content.

See screenshot with a page scrolled to the end:

[skyjake]

I suppose the amount of empty space in the bottom could match the whitespace on the sides, hmm. I'll have to try it out and see if I like it.