Adjust centered text/page breaks

[nichgray]

Right now, on a large screen (or zoomed out), some of the page breaks and other text that is centered drifts pretty far away from the text:

We may want to look into imposing some kind of fixed width for the centering so this does not happen. Discuss further with Karin when she has a chance to look.

[karindalziel]

I can't center it without breaking the behavior of the righthand bar. I can put a max width on it, but it would be left aligned.

I put a max width of 110em's on it now (should be just a little larger than a standard 1080 p screen), tell me what you think.,

https://whitman-dev.unl.edu/published/LG/1855/variorum/main.html

[nichgray]

Looks good