[openstreetmap-website] Add styling to make the /help page more approachable (#728)

[danstowell]

Scalable in terms of adding items, or something else? Additional items are easy to add - they just tile and wrap - and they can be styled easily. We don't really want the help page to scale to a massive number of items anyway since that would be baffling for a newcomer seeking help. But maybe I misunderstand you?

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Reply to this email directly or view it on GitHub:
https://github.com/openstreetmap/openstreetmap-website/pull/728#issuecomment-40574303
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