v1.6.1-beta.9

From newest to oldest:

• Fixed indexed embedded subtitles never being cleared when a rescan finds zero tracks 3853ba3
• Removed obsolete tuple-unwrapping check from manual subtitle upload flow following processing normalization. 11eee35
• Removed duplicated tuple-unwrapping checks from subtitle download, wanted, manual, and upgrade flows now that processing returns normalized results. dc1b19c