- fixed error when changing "Auto hide/unhide columns" option while no list is loaded
- added "Feature" to serializers so they can enforce that all TV channels must come before Radio and Data (but share a common number sequence)
- fixed issues where SQLite database files didn't get unlocked after saving
- fixed quirks with missing e_sqlite3.dll when running unit tests with Resharper
- added round-trip unit test for all loaders to check reordering channels and favorites, saving and reloading
- internal code clean-up regarding different favorite list modes (none vs. flags vs. ordered per source vs. mixed source)