cad/openvsp: Update to 3.50.5

ChangeLog:
https://openvsp.org/blogs/announcements/2026/06/05/openvsp-3-50-5-released

Features:

• Don’t no-show geometry when running VSPAERO when using Shown Set
• Disk Segment Breakdown for Projected Area calculations
• Export to CSV in Results Viewer
• Delete(all) in Results Viewer
• Zero rotation direction marker added to Prop

Fixes:

• Fix and/or clean up some asserts triggered in Debug mode
• Default to DBA, fallback to Triangle in ProjectionMgr
• Add missing Discrete Visualization info to Results
• Improve combined result in Discrete Visualization
• Fix some Field of View memory leaks in visualization analysis
• Fix writing pipe type beam sections to NASTRAN