Mute button doesn't work like unmute

[vl-ad]

Description

Mute button works only once and doesn't unmute the track.
When the track starts playing and I click "mute" button everything works well and the sound fades. But when I click this button in second time and want to unmute the track - it doesn't work.
I propose to add "toggle" functionality to the mute button, like it works, for example, on YouTube (that one click mute the video/audio and second unmute it).

[lijinke666]

ok, i'm will optimize it

[lijinke666]

fixed.