* Use chapters in duration filler * add new option, migrations, and update filler preset editor * Revert "Use chapters in duration filler" This reverts commit d87a8a240a78c1cbca7b311125f8d3a84645d296. * scaffold splitting filler by chapter * implement chapters as filler * update changelog * re-add migrations * Add duration for ChapterMediaItem --------- Co-authored-by: Jason Dove <1695733+jasongdove@users.noreply.github.com>