Required for #13005.
Opening an autosave-enabled document within a drawer triggers an
infinite loop when the root document is also autosave-enabled.
This was for two reasons:
1. Autosave would run and change the `updatedAt` timestamp. This would
trigger another run of autosave, and so on. The timestamp is now removed
before comparison to ensure that sequential autosave runs are skipped.
2. The `dequal()` call was not being given the `.current` property off
the ref object. This meant that is was never evaluate to `true` and
therefore never skip unnecessary autosaves to begin with.
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- To see the specific tasks where the Asana app for GitHub is being
used, see below:
- https://app.asana.com/0/0/1210697235723932
b40c581a27
