Customizable Power Supply Mount v2

Inspired by the Xbox 360 Slim mount bracket [here](https://www.thingiverse.com/thing:3742438) I wanted to design my other mounting brackets in a similar fashion.

Since the [original](https://www.thingiverse.com/thing:4326575) had two screw holes which I didn't really need as it would be mounted to the wall only, I changed the SCAD script so one can switch between vertical only mount which requires only one screw and the original system.

I included the possibility to add a corner/edge radius for smoother edges if one prefers their looks, but keep in mind rendering time is hugely increased when using rounded edges and corners.

The .json file included contains the presets for all the .stls, in case you want to render them yourself or modify the size a little (mine came out a little tight).

I added support for custom fonts as well, you have to put the font you want into your user home into the `.fonts` folder, restart OpenSCAD and then set the correct font name in the variable