Ensure typeahead stays on same item if it still matches

[RobinMalfait]

This PR ensures that if you have multiple items like:

• Alice
• Bob
• Charlie
• Bob

And you type b, then it should jump to the first bob, when you wait a bit and type b again, then we should go to the second bob, so far so good.
The issue is if you type bob or to be clear b, o, b, then it will jump to the first bob for b, to the second bob for o and to the first bob again for b.

This PR fixes that by making sure that you stay on the same bob while you are searching. Once the search time is over, then we will continue from that point onwards.

Fixes: #1090

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headlessui-react – ./packages/playground-react

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headlessui-vue – ./packages/playground-vue

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✅ Preview: https://headlessui-vue-git-fix-typeahead-jump-tailwindlabs.vercel.app