KodiFlix Info v8.46 - session cleanup

Preserves v8.45 behavior.

New:
- DialogVideoInfo <onunload> runs resources/lib/info_cleanup.py.
- Clears transient Window(Home) properties used only by the info template:
  KodiFlix.AccentColor
  KodiFlix.AutoplayCountdown
  KodiFlix.VoiceAutoplay
  KodiFlix.VoiceQuery
  KodiFlix.VoiceTMDbID
  KodiFlix.VoiceClearLogo

Persistent accent cache files and other addon data are NOT deleted.

Result:
each new info-page session starts without stale KodiFlix template state from
the previous title.
