Add hinged lids to WallHopper

[AlexCPU]

By suggesting a new box generator or other feature you agree to test cut it until it works. You understand that this may take a few attempts. As soon as it does work you will provide a sample image that can be used in the user interface or the documentation.

Describe the solution you'd like
WallHopper generator has optional hinged lids for the top and bottom. As proposed in #734

** Pictures of something similar **
Basically this, but fixing the overlapping cut lines on the hinge.