Link track with previous one doesn't set end of previous track

[NeoCoderMatrix86]

Describe the bug
If you have 2 tracks and both are not linked to each other, but the last has an begin set and you link the tracks, the end of the first track is not set.

To Reproduce
Steps to reproduce the behavior:

1. Add 2 tracks unlinked to each other.
2. Set begin of the last track
3. Link the tracks
4. End time of the first track is still empty

Expected behavior
The end time of the first track should be the begin of the last track.

Screenshots