Mixer shows master strip twice

When there is one stereo audio strip, the display shows the master both in the correct position on the right, and as an audio strip next to the expected audio strip. This is probably because the master shows up in the strips passed from rust to flutter. I think the best thing to do is not add the master to the strips as it has it's own named access. This will need to be fixed in rust in rust/src/api/osc/message/reply.rs where the master is already tested for. Must be a bug. Debugging commences