Set externally loaded files as unsaved.
Fix error in emitting split events.

Somehow missed this line when updating the event system.
Fix copy/paste and drag/drop issues.
Ensure labels do not include file extensions
Update the undo/redo stack when renaming tracks.
Display all metadata next to the track label.
Fix Time Code Cloning

Also made the API for dealing with tracks a little more consistent.
Delinting with several associated bugfixes.
Allow copying between tracks with different MIMEs.
Begin implementing data access hooks.
Adding default controls.
Improved Controlbar system.
Feature Updates

Added move-after-add & anchor-seeker settings and added built-in media
synchronization. Removed multiselect setting 'cause there's no point in
ever using single-select mode anymore.
Implemented copy-on-drag.

Requires holding down the ctrl key on mousedown to activate.
Fixed up the autocue system.
Improving control customizability.
Implement autofill with a linebuffer.

This feature might still be buggy 'cause the Ayamel CaptionAider page
hasn't been updated to properly exercise it yet.
Allow injecting the confirm function.
Menu Improvements
Fix menu positioning.