SmartThings Hub (Gen2) Wall Mount - Ports on Bottom

I remixed this from cmar's design since I wanted the mount to allow the ports to face the bottom. My hub was *very* snug in the original, so I also added 1mm to the width and depth of the opening for the hub. It's still snug, but not enough to warrant reprinting.

I had printed the original with an infill of 35%, but immediately snapped off the top half of the back when taking it off the bed. It might be fine if you're careful (and don't put stress there), but I printed the next one with 100%