15b5 - Delete empty tracks doesnt update Mixer names

Create two audio tracks. Put music on track two. Right click on audio tracks, select "Delete empty tracks", the empty track is deleted, and "Audio 2" is renamed automatically to "Audio 1", but the name on the mixer panel remains at "Audio 2", even though its now showing the audio levels from "Audio 1".

Renaming the audio track after this does correctly update the mixer name.