XWIKI-20563: Duplicate headings can lead to broken internal links in the generated PDF

Currently translated at 100.0% (9 of 9 strings)

Translation: XWiki Platform/XWiki.TemplateProviderTranslations
Translate-URL: https://l10n.xwiki.org/projects/xwiki-platform/xwiki-templateprovidertranslations/ro/

Currently translated at 100.0% (2 of 2 strings)

Translation: XWiki Platform/Help.SupportPanel.Content
Translate-URL: https://l10n.xwiki.org/projects/xwiki-platform/help-supportpanel-content/ro/

Currently translated at 100.0% (15 of 15 strings)

Translation: XWiki Platform/Help.Translations
Translate-URL: https://l10n.xwiki.org/projects/xwiki-platform/help-translations/ro/

Currently translated at 100.0% (25 of 25 strings)

Translation: XWiki Platform/XWiki.OfficeImporterTranslations
Translate-URL: https://l10n.xwiki.org/projects/xwiki-platform/xwiki-officeimportertranslations/ro/

Currently translated at 64.6% (2872 of 4439 strings)

Translation: XWiki Platform/XWiki Core Resources
Translate-URL: https://l10n.xwiki.org/projects/xwiki-platform/xwiki-core-resources/ro/

Currently translated at 100.0% (14 of 14 strings)

Translation: XWiki Platform/Skin Extensions
Translate-URL: https://l10n.xwiki.org/projects/xwiki-platform/skin-extensions/ro/

Currently translated at 64.6% (2868 of 4439 strings)

Translation: XWiki Platform/XWiki Core Resources
Translate-URL: https://l10n.xwiki.org/projects/xwiki-platform/xwiki-core-resources/ro/

[Misc] Avoid locking the XWikiPreferences page during the test (otherwise a lock will be displayed when using the admin action afterwards) + remove now unecessary setGlobalRights() call

* Remove content pushed by mistake

* configuration is not compatible with new specifications

* update default configuration file accordingly

* Updated functional tests to take into account the wrapping of the picture in a button.

  * Add the implied View right to Delete right
  * Cover the change with a new UC in existing integration test

  * Ensure to properly escape translations
  * Provide a new integration test for it

* Fix javadoc

This reverts commit ca99a12f.

This reverts commit bfc3db49.

* Change NewsSourceFactory#create() to accept a descriptor, after Thomas's suggestion

Currently translated at 100.0% (4439 of 4439 strings)

Translation: XWiki Platform/XWiki Core Resources
Translate-URL: https://l10n.xwiki.org/projects/xwiki-platform/xwiki-core-resources/de/

* Some API refactoring. Added the concept of aggregating sources on the client side + allow server-side sources to provide their own aggregations

Currently translated at 98.6% (4376 of 4436 strings)

Translation: XWiki Platform/XWiki Core Resources
Translate-URL: https://l10n.xwiki.org/projects/xwiki-platform/xwiki-core-resources/ja/

XWIKI-20530: Attachment Selector macro does resolve attachment from different target document (#2044)

* XWIKI-13786: Accessibility problem with rights management's checkboxes states
* Added tabindex for the checkboxes (access through keyboard).
* Added keyboard responsiveness to the checkboxes.
* Fixed a loss of focus when changing the state of a right by validating it.
* Tested changes manually with a screen reader (orca-debian)
* Added comments
* Added some L10N support
* Wrapped the image in a button, and moved behaviur to this button.
* Added a 'nextstate' function for code factorization.
* Fixed the event listener instantiation to a more up-to-date way.
* Fixed the event listener instantiation to reduce Prototype usage.
* Removed the (unused) label from the rights-edit. See https://github.com/xwiki/xwiki-platform/pull/2051#discussion_r1086354379