Bug fixes:
- Fix fd leak when opening .desktop files externally
- Fix the order of categories changes randomly
Improvements:
- Redesign the app for better responsible support
- Automatically decides .desktop filename instead of the user
- Do not navigate to files view after saving in case the user wants to continue editing
- Support setting GenericName and Keywords
- Load .desktop files asynchronously
- Flatpak: Update GNOME runtime to 46
- Code refactoring and organize project structure
- Update translations