Sonos Subs

Current features:
- Adds a button to show lyrics of the current song.
- Adds "scroll-to-adjust" to the volume sliders.
- Adds optional notifications for when a new song starts playing.
- Adds audio controls in the popup.
- Adds device audio controls using the Media Session API

How to see lyrics:
1. Open the Sonos Web Player (https://play.sonos.com/)
2. Click the lyrics icon on the top right
3. Enjoy!

How to disable notifications:
1. Click the extension icon in your browser
2. Toggle the "Song Notifications" off

How to turn use "Media Session Controls":
1. Open the Sonos Web Player (https://play.sonos.com/)
2. In the URL bar, click on the "View site information" icon
3. Select "Site settings"
4. Go to "Sound" and select "Allow"

Got ideas for anything you would like added?
Please let me know and I will try to make it happen!