Mute channel

[Tests]

For the time being, there is a solution to this.

First, click the instrument you want to mute. Then, click the "highlight this one" button. It is circled in red in the picture below.
https://imgur.com/a/B1Tfv
Next, press [Ctrl (Cmd on a mac) + C],
Press either [Delete] or [Backspace].
Go to another sequence in a new tab and press [Ctrl (Cmd on a mac) + V]
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If you want to unmute the track, just go to the sequence you pasted the notes into and press [Ctrl (Cmd on a mac) + C] and then go into your other sequence and press [Ctrl (Cmd on a mac) + V].