volume control

It would be better to have volume control through the system notification slider control as for now it is controlled through the general slider conrol @my android device. 

The problem is that if you try to normalize the volume with other system notifications the other sounds (music/youtube/other) are too loud.

as it is a notification app it would nice if it could be managed with this notification volume control seperate from the general volume control.

kind regards,

Ronald.