Fix music volume update on trackbar dragging (close #51)

Закрыто xottab-duty запросил слияние github/fork/LVLVbNH/fix_vmusic_trackbar в xd_dev

Created by: LVLVbNH

Fix music volume update on trackbar dragging by adding "depend="runtime"" to "track_musicvolume" (close #51 (closed)).