Table-layout: fixed => topic list does not expand

Since the introduction of the vanilla framework styles into this discourse instance, the topic list has not been expanding horizontally to fill all available space.

This is because tables all carry the style table-layout: fixed. I propose table-layout: auto for .topic-list to fix that.

Also p having max-width: 40em does not mesh well with discourse. That just doesn’t look right in posts.

I’m going slightly blind, it seems. The issues are well known: Maintenance announcement - Theme update