Veusz 3.4.99 (prerelease)

3.4.99 is a prerelease for the forthcoming 3.5. Changes are:

• Improvements in fitting (thanks to Sebastian Koenig), including:
  • Assume absolute errors by default
  • Introduce minimum and maximum fit ranges
  • Add setting to give default error value and type (absolute/relative)
• Fixes for macOS button appearance (Takuro Hosomi)
• Plugin fixes, renaming --plugin to --veusz-plugin option
  (also thanks to Takuro Hosomi)
• Bug fix for broken axis drawing
• Mirrored axis bug fix
• More keyboard shortcuts
• Fix build system to use sip-build, which works with recent SIP versions
• Change high DPI scaling policy
• Support _FillValue and missing_data attributes in HDF5 files for NetCDF