cad/openvsp: Update to 3.51.0
ChangeLog:
https://openvsp.org/blogs/announcements/2026/06/29/openvsp-3-51-0-released
Features:
- Copy/paste XSec & XSecCurve across Geoms and Geom types
- Detachable conformal components with special treatment of hinges
- AeroCenter geometry analysis added
- Maximin interference metric
- X3D files now written with split surfaces – prettier normal vectors
Bug Fixes:
- Geometry Analysis names improved in GUI
- Improved accuracy of min-distance mesh calculations
- Auto-show vehicle notes now works from command line and double-click
- Better plotting of -Cp for VSPAERO slices
- Gear attach point update now works when Gear itself is moved
- Faster update for some hinge/conformal combinations
- Compiler warnings and build system cleanups