Focus the trigger when content setting modal is closed

[obulat]

Fixes

Fixes #4337 by @obulat

Description

This PR adds the triggerElement prop to the VInputModal's modal content to focus the trigger when modal is hidden.
In addition, it also fixes the search bar button: when they are focused, only the inner focus ring is visible instead of the current broken two rings:

Testing Instructions

1. Go to http://localhost:8443/search?q=cat, and narrow your screen to mobile width.
2. Click on the content settings button inside the search bar.
3. Press Tab
4. The content setting button should be focused (with a pink ring around it).
5. Compare this with the production: on openverse.org/search?q=cat, follow the same steps. Nothing should look focused. If you press Tab again, you'll see that "Skip to content" button is focused, which shows that the body was focused when the modal was hidden.

Checklist

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  PRs) or the media properties generator (just catalog/generate-docs media-props
  for the catalog or just api/generate-docs for the API) where applicable.

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[obulat]

This is necessary for the type in VHeaderMobile to work (ref<InstanceType<typeof VContentSettingsButton>>)

[AetherUnbound]

Do you mind adding testing instructions for this PR @obulat?

[obulat]

Do you mind adding testing instructions for this PR @obulat?

Sorry, I've written the reproduction in the issue, and must have mixed that with the testing instructions :) Updated now.

[zackkrida]

Much better! #3195 was distracting while testing 😆 but nice work.

[AetherUnbound]

Admittedly, I'm not able to see any difference between prod and my local copy when testing this 🤔 But the code looks good!