Visual Layout: too much whitespace on sides + unwanted overflow in middle

[SeanKilleen]

This compression in the center appears to cause unwanted overflow, which is doubly problematic when we display tables that may have a column hidden by scrollbars as a result.

Example page affected by this: https://docs.nunit.org/articles/vs-test-adapter/Tips-And-Tricks.html

(Hat tip to @OsirisTerje who pointed this out)