CVobFile: Various cosmetics.
Update LAV Filters to 0.58.2-82-1c821dc (custom build based on 0.58.2-78-c57d802)

Important changes:
 - Add support for HEVC and VP9.
 - Fix a potential crash in tray icon custom patch: double-clicking on LAV Video/Audio tray icon could lead to crash because of uninitialized pointers.