Check for both old and new class IDs and use the one that exists when wrapping. Also add FormTracker as the observer object so that its notify function is correctly called by nsHTMLFormElement.
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extra : rebase_source : 470430eaa643415e635836db3c38fb639a4e44b6
Add a component that notifies when satchel methods are getting called. The notifications come as "form-notifier" with JSON data of the function name, arguments, and type (before vs after).
