Add clickable labels to encryption recovery radios

This is a fix for Issue: #11174.

### Possible Changes
* Instead of applying a new `id` attribute to the radio buttons, we could instead wrap the radio button `input` tag inside of a `<label>`.

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Add clickable radio button labels to the encryption recovery settings pages:
* `settings-admin.php`
* `settings-personal.php`

Pressing on the radio button text now toggles the state of the radio button.

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Let me know if you have any suggestions or improvements.