Record Track in a separate channel

[DimitriyPS]

Enhancement

Necessary to output the "Record Track" to a separate channel. This is necessary for the exclusive control of track frequencies when composing a work.

Justification

I am trying to replace FL Studio with LMMS in my work. I immediately ran into the problem that adding a “Record Track” I cannot output it to a separate channel, I cannot filter it separately, I cannot impose effects on it. LMMS is a very interesting program, but this limitation alone does not allow me to switch to its use.

Mockup

[DomClark]

Duplicate of #133. This is implemented on master and should be available in 1.3 when it is released. See #3866.