* Change the appearance of the filter actions
* Minor design fixes
* (Global design) Add a new CSS class : buttonGradient and apply it on the button add photos on add photos page
* Change batch manager checkbox to correspond to tag manager
* See button on picture edit page is now unavailable if the picture is in a private album
* Language correction
* Design fixes on batch manager selects (and general design fixes on batch manager)
* Minor design fixes
* Add a dark mode to the tag manager
* Change design of the select number tag per page to correspond to the tag manager
* Small design fixes
* Clean and reorder css files
* 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
* Search function search now the begining of tags names
* "Select all" now select the searched tags
* Design fixes on select buttons and add tag form
* Bug fixes on actions involving more than 1000 tags
* Hide tags over 100 in Tag's manager
* Change the selection algorithm : now faster
* Change tag's manager header disposition
* Change filter design of Group Member manager and plugin to match with the tag's filter
* 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)
* Statistic page totally redesign, replace by a single graphic which display for last hours, days, months and years
* Add Chart.js plugin for graphic representation
* Add Moment.js plugin for time operations
