Making the channel management panel more useful. [Copying channels or removing them]

[BlastlessAnthony]

As the title suggests, it would be very nice to have the ability to copy channels to other channels or delete them out right, this really comes in handy when porting songs to a different console (either with more (making use of echos) or less channels (getting rid of useless channels WITHOUT appending a chip and dragging the channel there then deleting the chip.))