* Fix coverage with a new test

* Fix coverage in xwiki-platform-search-api

This works contains:

    - a renaming of ModelBridge class contained in xwiki-platform-notifications-filters-api to FilterPreferencesModelBridge to clarify what it's used for: this leads to renaming lots of stuff
    - a new API in NoficationFilterPreferenceManager (and lower level components) to allow deleting multiple filters at once
    - a new component DeletedDocumentCleanUpFilterProcessingQueue aiming at processing the clean up of notifications filters in a dedicated low priority thread, a listener DeletedDocumentCleanUpFilterListener calling it whenever a doc is deleted in a folded event, and UserEventDispatcher calling it also whenever a doc is deleted in an unfolded event
    - a migration to clean up filters that are not related to an existing documents when upgrading

*Fixed test regressions introduced in https://github.com/xwiki/xwiki-platform/commit/92c46a63a954990fb64e95b78a4a4e112cb1583a

Note: passed test mvn clean install -f xwiki-platform-core/xwiki-platform-panels/xwiki-platform-panels-test -Pdocker -Dxwiki.checkstyle.skip=true -Dxwiki.enforcer.skip=true -Dxwiki.revapi.skip=true;

  * Simplify condition and always run refactoring of filters over all
    wiki since any wiki might store user with filters

XWIKI-21473: Improve search suggest evaluation

This reverts commit 1629ea9d.

* Removed H1 from the Dashboard sections
* Removed H1 from the Panels
* Fixed the home page header level
* Removed multiple h1s from the user profile sections
* Updated the content of the sandbox page
* Removed a style rule that is just extra as of now
* Updated translations to follow the changes applied in the English files
* Updated the administration section title to a H2 (see Editing -> Wysiwyg editor )
* Updated CSS to avoid backward incompatibility

* fix comments

XWIKI-21670: The versionPreserved instance output filter stream prope…

* Fix property descriptions

This reverts commit 72de0ac3.

Apparently the computation method changed, probably due to an upgrade of
another library (the investigation doesn't clearly show what's
responsible of this change).

This reverts commit ee9505d3.

  * Move EventType to DocumentEventType in eventstream-store-common
    module
  * Use the new API instead of string litterals where needed

* Performance: We shouldn't go through PO to create test fixtures, it's slower
* Best practice: use the TestReference object to create test pages
* Consistency: use "setup" as the parameter name for TestUtils

XWIKI-21621: The default image style is not forced as selected when inserting images when identifier and type are different

Fix the style options being ignored when the identifier and type are different.

  * The parameter has been long deprecated and removed from xwiki.cfg,
    it should have been removed from the code too

Currently translated at 100.0% (14 of 14 strings)

Translation: XWiki Platform/UI Extension API
Translate-URL: https://l10n.xwiki.org/projects/xwiki-platform/ui-extension-api/uk/

Currently translated at 100.0% (3 of 3 strings)

Translation: XWiki Platform/XWiki Platform Icon Default
Translate-URL: https://l10n.xwiki.org/projects/xwiki-platform/xwiki-platform-icon-default/uk/

[Misc] Upgrade to try to fix the "Build caching was not enabled for this goal execution because 'argLine.jacoco.append' was set to 'true'." problem with GE caching

* Updated style of the title section of the xdialog
* Added the class btn-xs to the close button (avoid it being way too large )
* Replaced the content with a cross icon (no need for alternative because there's a title on the button)
* Updated style to fit the bootstrap modal one