Released Veusz 4.0

Veusz 4.0 has now been released. Please visit the download area to update.

Changes in 4.0:

• Update to using Qt6 (jeremysanders/korintje)
• Documentation updates
• Copying SVG or image widgets copies image data (from slowphil)
• Bug fixes:
  • HDF5 import
  • 3D rotation
  • Swap attributes for 2D data if transposing
  • Hide stderr from embedded usage unless debug=True
  • Fix histogram2d fro normed to density
  • Fix for datasets of different lengths if using gap_handling=’ignore’
  • Rename nan_handling to gap_handling
  • Continue loading if error in plugins
  • Fix overlapping formatting dock on Mac (korintje)
• Binaries now built using GitHub actions