Senddevice should work as in Buzz

Some improvements on the *SendDevice

My Buzz friend pointed out that it Renoise does not seem to be able to
route the left and right channel to different effects…

Therefore it would be good if the SendDevice got some improvements:

  1. Be able to split the left and right channel and send them to different
    Sendtracks…

You must beable to control the Amount for each channel.
And Mute source/Keep source on each channel.

It would also be nice if the SendDevice could send the signals to several
Sendtracks at once…

But thats not as important…Because you can have several senddevice’s…

Thats it…

Removing the mute source choice and replacing it with two sliders (amount for left and right channel) would solve everything.