Release 2.4.2

- Improve resilience against memory attacks - overwrite memory before free [#3020]
- Prevent infinite save loop when location is unavailable [#3026]
- Attempt to fix quitting application when shutdown or logout issued [#3199]
- Support merging database custom data [#3002]
- Fix opening URL's with non-http schemes [#3153]
- Fix data loss due to not reading all database attachments if duplicates exist [#3180]
- Fix entry context menu disabling when using keyboard navigation [#3199]
- Fix behaviors when canceling an entry edit [#3199]
- Fix processing of tray icon click and doubleclick [#3112]
- Update group in preview widget when focused [#3199]
- Prefer DuckDuckGo service over direct icon download (increases resolution) [#2996]
- Remove apply button in application settings [#3019]
- Use winqtdeploy on Windows to correct deployment issues [#3025]
- Don't mark entry edit as modified when attribute selection changes [#3041]
- Use console code page CP_UTF8 on Windows if supported [#3050]
- Snap: Fix locking database with session lock [#3046]
- Snap: Fix theming across Linux distributions [#3057]
- Snap: Use SNAP_USER_COMMON and SNAP_USER_DATA directories [#3131]
- KeeShare: Automatically enable WITH_XC_KEESHARE_SECURE if quazip is found [#3088]
- macOS: Fix toolbar text when in dark mode [#2998]
- macOS: Lock database on switching user [#3097]
- macOS: Fix global Auto-Type when the database is locked [#3138]
- Browser: Close popups when database is locked [#3093]
- Browser: Add tests [#3016]
- Browser: Don't create default group if custom group is enabled [#3127]