Import Multiple MIDI Tracks Into Existing Project

Please allow Synfire to import multiple MIDI tracks into an existing project. And, if this is done, please add an *option* to assign which source MIDI tracks go to which destination instruments in Synfire.

It would be very handy to be able to try out different MIDI files quickly within existing Synfire projects.

Currently, it seems our options are limited to only importing one track at a time to an existing Synfire instrument in an existing project, or importing multiple tracks into a new arrangement.

-Thanks