Replaced DOMNodeInserted with MutationObserver

[degenone]

I noticed that there was a warning in the browser console:

[Deprecation] Listener added for a synchronous 'DOMNodeInserted' DOM Mutation Event.
This event type is deprecated (https://w3c.github.io/uievents/#legacy-event-types) and work is underway to remove it from this browser.
Usage of this event listener will cause performance issues today, and represents a risk of future incompatibility.
Consider using MutationObserver instead.

Chromium has officially deprecated mutation events, and has a plan to remove support starting with version 127, which goes to stable release on July 30, 2024.

https://developer.chrome.com/blog/mutation-events-deprecation/

Deprecated: This feature is no longer recommended.

https://developer.mozilla.org/en-US/docs/Web/API/MutationEvent/

As far as I can tell there is no change in behavior on the site with this change.

[csharpfritz]

Looks like a failed test right now... we'll need to investigate

[csharpfritz]

Thank you for the update! Looks like this is working properly with the other Playwright test fixes