- Background thread for image caching (from null_pointer)
- 'Cache all artwork' option and progress bar
- Progress bar for deletion
- New (faster) method for single season entry (but broken due to MB3
issue on series with more than one season)
- Default SortBy for seasons (from themightylc)
- Prevent directory listing from refresh on play (w/ help from
null_pointer)
- Performance benchmarking when debug enabled (from null_pointer)