[BUG] splitted audio is inserted into the wrong track.
steps to reproduce:
- insert a video in the timeline on the track V3 or V4 (only the video part) 2 select the video and go to : timeline ---> current clip ---> split audio observed results the audio track is inserted in A1
the audio track is inserted in the audio track equivalent to the video track in use
for example: video in V3 ---> audio in A3