System Preferences does not show input volume at zero when microphone is muted

[mskri]

When muting microphone with Mooze and then going to System Preferences > Sound > Input shows the input volume at the same level it was before muting. The microphone is muted but it is not reflected in the system UI.

Setting input volume to 0.0 when microphone is muted could fix this. This comes with a caveat. We would need to save the current input volume level before setting it to 0.0 so that we can set it back to what it was when microphone is unmuted.