* refactor classic and block schedules to use same alternate schedule selector
* handle start year and end year
* add migrations for classic and block schedules
* allow editing block template start and end year
* add tests that include years
* add date range editing to classic (alternate) schedules
* fix running tests locally
* restore media files load; needed for local folder scanners
* update changelog
* feedback
* move watermark options into watermark selector
* fix graphics engine overlay performance
* more refactoring
* add some tests for existing watermark selector behavior
* remove extra ffprobe call on all watermarks
* remove a bunch of unused code; add failing tests
* implement new watermark selection
* add tests for new selector
* probably sufficient (though verbose) test coverage
* more tests
* remove some unused code
* simplify watermark selection
* remove old selection code and tests
* more tests
Jason Dove