Make home page easier to use.

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Example: https://bcda-aps.github.io/apstools/dev/index.html

Inspired by bluesky-adaptive, work of @maffettone.

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BUT, handle the switcher in a different way. The method in apstools is inefficient.

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Already using that theme. Switch to the card-based display, like apstools and bluesky-adaptive.

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before

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Not using switcher here

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after (draft)