Revision 12.c (2022-07-15)
About: Registered users can select photos from the gallery and save them into collections - an advanced "favorites" feature.
They can also set their collections as publicly visible and send them by email.
Administrators can export collections in CSV format.
Changes: Speed improvement on detecting if Gthumb+ is active
Revision 12.a (2021-11-12)
About: Allows users to download photo selections in ZIP files (such as album, search result, newest....)
Compatible with 'User Collections' plugin
Compatible with 'Bootstrap darkroom' theme
Changes: Compatibility with Piwigo 12