Topic Cards: don't show cards in the Suggested Topics

When using the great component, the Suggested topics at the end of any page also shows the topics as cards. While cards are great in the main pages, they are overblown at the end of all pages, and distract from the actual page content or discussion.

The solution could be simple: remove Topic Cards styles from the Suggested Topics and let them render as the Default theme does by default.

See for instance this screenshot, where the Suggested Topics take way more space and attention than the topic itself:

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