Onionskin On/Off temporarily

[fracturedray]

I was surprised to see there was no way to turn on and off onionskins with one button that will remember all the frames I had marked..

Is it possible to make a simple switch for Onionskins in the "Display Quality" list that would be disabled if no Onionskins frames are active and then active if there are a few frames active for Onionskin?

-thanks

ray