- Updates to project and desktop metadata in preparation for flatpak packaging
- These updates are independent of flatpack
- This commit unmingles the actual flatpack packaging from #255
- Moved detailed version information from ReportBugDialog to Version::details()
- Added QPA Platform information to verbose version information
- Added Qt version to detailed version information
- Added `-V` command line option to glabels-qt and glabels-batch-qt
- Made greater use of smart pointers, eliminating many instances of manual memory management
- Do not use pointers at all for many non-polymorphic classes
- Assorted other code cleanup