[SRU] catfish 1.4.6, New upstream microrelease

[Rationale]

This microrelease contains a large number of bug fixes and translation updates.

Bug Fixes:
- Thumbnailer uses correct permissions for directories and files.
- Disabled overlay scrollbars to improve interacting with the results list (Xfce #14487)
- Enabled launching of executable AppImage files (Xfce #14500)
- Fixed invalid date in appdata (Xfce #14502)
- Improved handling of exceptions when parsing settings (Xfce #14491)
- Improved handling of UnicodeDecodeErrors (Xfce #14490, LP: #1646714)
- Improved handling of PermissionErrors (Xfce #14488, LP: #1567787)
- Improved support for hidden files (Xfce #14497, LP: #1731608)
- Xfce: Open directories with the preferred file manager (Xfce #14483)

[Regression Potential]
Regression potential is minimal. This release includes very specific bug fixes to handle specific exceptions, determine if paths are considered "hidden", and better support the FreeDesktop.org Thumbnail specification.

[NEWS]
Catfish 1.4.6

Catfish is now part of Xfce! Update your links:
- Homepage: https://docs.xfce.org/apps/catfish/start
- Bugs: http://bugzilla.xfce.org/buglist.cgi?product=Catfish
- VCS: https://git.xfce.org/apps/catfish
- Translations: https://www.transifex.com/xfce/public

Upgraded thumbnailer, based on the FD.o Thumbnail Spec:
- Improved error handling
- Proper permissions for thumbnail directories and files
- Logging of failed thumbnail generation
- Saving of thumbnail file attributes
- Support for relative thumbnail directories

Bumped minimum GTK+ version to 3.16

Bug Fixes:
- Added inode/directory mimetype to desktop entry (Xfce #14505)
- Disabled overlay scrollbars to improve interacting with the results list (Xfce #14487)
- Enabled launching of executable AppImage files (Xfce #14500)
- Fixed invalid date in appdata (Xfce #14502)
- Replaced stock icons with standard Mime Type icons (Xfce #14503)
- Improved handling of exceptions when parsing settings (Xfce #14491)
- Improved handling of UnicodeDecodeErrors (Xfce #14490)
- Improved handling of PermissionErrors (Xfce #14488)
- Improved support for hidden files (Xfce #14497)
- Remember window size and position between sessions (Xfce #14504)
- Xfce: Open directories with the preferred file manager (Xfce #14483)

Translation Updates:
Albanian, Belarusian, Catalan, Chinese (China), Chinese (Taiwan), Croatian, Czech, Danish, Dutch, French, Galician, Greek, Hebrew, Italian, Lithuanian, Norwegian Bokmål, Polish, Portuguese, Portuguese (Brazil), Russian, Spanish, Swedish, Ukrainian

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Catfish 1.4.5

Translation Updates:
Catalan, Danish, Dutch, Lithuanian, Spanish, Swedish, Turkish