There Is A Backup Option
So You Could Restore From A Backup, If you have one.
When I'm working on play list of 100 - 150 tracks I make a lot of changes, reordering, replacing sometimes i make errors so I need undo for play list operations. Library backup isn't solution for that and there is no keyboard short cut for this. Almost every text editor has both undo and save operations.
How did that happen?
Simple, shift-ctrl-home, del instead of shift-ctrl-end, del. I wanted to delete few tracks from play list but deleted 120+. Is there way to reverse this?
