Extract from https://github.com/go-gitea/gitea/pull/25940 and because
https://github.com/go-gitea/gitea/pull/26743 does seem to need more
work.
This will be required if we are to run our JS in [strict
mode](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Strict_mode).
Previously, the two variables `$fields` and `$dirtyForms` polluted
`window`:
<img width="1145" alt="image"
src="
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jquery.are-you-sure.js |