Robo3D R1+ LCD Panel Bracket

This is a simple Thing to facilitate securing an LCD panel to the front of a
Robo3D R1+ printer. It can be super-glued to the back of any LCD panel mount
that is flat. It includes a simple stopper brace to keep the panel from
drooping too far. If you want to angle the display upward more, you can
increase the `stopperLength` variable and rebuild the `.stl` file using
OpenSCAD or the Thingiverse Customizer feature.

(Note that the photos show the mount glued to a screen in its housing and
mounted on the printer. The rendering shows this Thing alone.)