* new conf setting related_albums_maximum_items_to_compute (1000 by default). Beyond this number of photos in current set, do not try to find related albums.
* new conf setting related_albums_display_limit : only display the heaviest (most related) albums.
This method handles its own authentication and can be called by an anonymous request. Thus it should not be blocked by a $conf[guest_access] setting set to false.
In order to change from versions 2.10.x to 11.x.y, Piwigo needs to only consider 11 as the branch, and not 11.x. Or else it will mess up with minor and major updates.
* ability to combine albums in URL index.php?/category/1/2/3 will consider 1 as $page['category'] and {2,3} as $page['combined_categories']
* new menu block "related albums" which displays only the hierarchy of albums related to the current set of photos, excluding current album(s). In the hierarchy, only the related albums have a link, not ancestors
* use configuration setting quick_search_include_sub_albums (default=false) to activate this feature.
* the list of sub-albums is not displayed in the list of album results (to avoid too long lists).
* Add a select dropdown to chose how many tag is displayed per page
* Add a message beside selection's buttons to apply selection to all tags
* Bug and design fixes
* Hide Tag item when there are more than 5
* Change data format in Ajax calls
* Remove useless code in tag.php
* Remove pwg_token in pwg.tags.add
* Minor design fixes
* Create the new design of tag manager
* Replace all actions by ajax actions
* Add delete, rename, duplicate and merge tag's functions in the Piwigo API
* Modification of group manager to match both designs
* Statistic page is now more clean with 0 or 1 values (for new Piwigos)
* Rectification of a mistake in functions_mysqli.inc.php (replace 'groups' by 'rank')
* Batch Manager no longer have a php error
* Intro Graph display the actual week when it's monday
* fix the "groups" reserved word
* History is now summarize on the stats pag access
* New piwigo no longer have PHP error due to stats.php
* Number of weeks for Activity Chart is now in configuration file
* Tooltip change for activity chart and add for storage chart
* General page design change
* Number of years compared is a configuration variable (default 5)
* Months compared are the actual, the last and the actual month the last year (you can also visualize the average last 12 months)
* Icon colour standardized with intro page in css
* Dark mode colour changes
* Load state changes on several actions (especially in delete popin)
* Rename group action is now effective if the name didn't change
