Fix tables and lists in reference items

[davepagurek]

I was looking into making a custom build of the site to show shader hooks docs on for people testing out the feature before it's merged and deployed.

I noticed a few little styling issues in reference pages:

• Lists don't have numbers or bullets
• Table cells aren't aligned to the top

This addresses those issues:

[Qianqianye]

Thanks @davepagurek!