trackswitch does not support Chrome 70

[faroit]

Chrome 66 was released a few days ago and trackswitch falls to the victim from the recent changes of Chromes new user interaction model:

The AudioContext was not allowed to start. It must be resume (or created) 
after a user gesture on the page. https://goo.gl/7K7WLu

That means trackswitch doesn't play audio on Chrome 66 at all, so this would need to be addressed asap.