[t3118] Prevent unnecessary calls to Track.updateTrackEvents when sorting.
Blacklist certain keys and remove the keydown listener when they are pressed to prevent multiple firings
[t3045] Prevent end === start causing overlapping trackevents.
Fix keymovements preventing this
[t3048] Force new trackevents to be created on a specific track
[t3181] Prevent crash from dragging sorting handles on specific spots
Bug #3179 - Remove unused files from root