@menion, yes, I see them. I think there are must be option in three dot menu to close "modify track" mode without saving data, sometime I want just to play with track shape, no to save it.
Another two issues with "Modify track" mode:
1. I have five point track, I select the third point, when I select "remove all before" Locus says that it will remove points 1-2, thats correct, but it highlights only one track segment between points 1 and 2 (that's NOT correct), and after I hit OK it removes point 1 and 2 and two track segments (that's correct). The same with "remove all after".
2. I have track with two overlapped points (almost exactly, so zoom wouldn't help), and there is not possible to delete these points, or to move them. See screen