Nested lists' percent width causes unusably narrow element width

[kevinmarks]

if you put a list inside a list, or a blockquote inside a list, they get narrower and narrower to the point of farce

[daveliepmann]

Replicated. In the future, please remember that the more detail and rigor you provide reporting an issue, the easier it can be replicated and addressed.

[daveliepmann]

Only top-level lists (e.g. within sections) are now width-restricted. This should resolve the issue. If you have other examples of the problem, or if this solution interferes with other scenarios, please provide examples.