feat: remove the unread notification count from the page title

[sylvain-reynaud]

The page title of a youtube tab looks like (123) Rick Astley - Never Gonna Give You Up (Official Music Video) if you have 123 unread notificaitons.

This feature removes (123) from the tab title => Rick Astley - Never Gonna Give You Up (Official Music Video)

Since the extension removes the notification button, I guess it is a good feature proposal. Let me know :)