- Updated to use MutationObserver (https://developer.mozilla.org/en-US/docs/Web/API/MutationObserver) to dynamically update the tracked media pipelines. This greatly improves reliability and stability of the plugin.

- Simplified the internal messaging for reliability.

- Fixed a bug where changing the preset didn't result in changes to the current media pipelines.

- Fixed a visual bug that caused funny alignment of the gain values.