Ensure that the SoundEnabled checkbox is set to the correct value on startup

main.go

@@ -199,7 +199,7 @@ func systrayOnReady() {
 		"Notifications enabled", "Whether notifications are enabled", true,
 	)
 	mSoundEnabled := systray.AddMenuItemCheckbox(
-		"Sound enabled", "Whether sound is played", true,
+		"Sound enabled", "Whether sound is played", ProgramConfig.SoundEnabled,
 	)
 	systray.AddSeparator()
 	mQuitOrig := systray.AddMenuItem("Quit", "Quit the whole app")