v1.5.0-alpha.0

• Add macos support (Thanks to batuhand)
• Add pdf export support
  • Add export presets
• Add mutli selection option
• Add property view
• Add native file opener for pdf, image and notes
• Add export button to data settings
• Add option to import files from file on pwa
• Improve context menu (add modal background, add new scale animation)
• Fix image import bug
• Use json converters to load/save json (fixes missing type and version info)