Simple Pocket Operator Cover

A simple snap-on cover for the great [Pocket Operator case](https://www.thingiverse.com/thing:1375818).

I needed something basic to cover up the buttons so they wouldn't get pressed in my bag. It ain't complicated but it helps a ton. The knobs stick out the front, but hey, the batteries stick out the back. Don't believe any battery will get wasted from the knobs turning but I could be wrong.