Ability to "send to all channel" in expression map

Instrument tracks only, using expression map to switch midi channel

Expression map does not broadcast to all channels, which is intended but inflexible when it comes to multiple similarly-keyswitched patches

1 kontakt instance, 2 choir patches, 2 midi channels, both using the same keyswitches for words

In this scenario, one cannot use the same keyswitch to change the words of the two patches