Improved NanoVNA Case

This is an improved version of the following NanoVNA case by Hagster:
https://www.thingiverse.com/thing:3818979

Changes are:
- The original frame fits clones without RF shields. For NanoVNAs where the RF shields are populated though, a lip in the frame is in the way. In this version, the frame is modified accordingly (bottom frame).
- The orientation of the lid was rotated by 180°. We feel that the original design has a lid that occludes the view into the compartment. Rotating the hinge-point (top frame) addresses this.
- The lid is modified to have our club call sign "HB9UF" embossed instead of "NanoVNA". This is probably not of interest to many but in the spirit of the license we include this anyway. You can mix and match between the objects of the original and the improved frame.