v4.9.0

Note - after update to 4.9.x all buttons (Sound Mode) need to be configure again using config UI.

Changes

• changed button direct surround mode control, MOVIE(Surround), MUSIC(Surround), GAME(Surround), PURE(Surround)
• config schema updated
• cleanup

Full Changelog: v4.8.1...v4.9.0