(cherry picked from commit 587778b8)

(cherry picked from commit 0040c3a6)

* ignore sonar false positive

(cherry picked from commit d74a1af9)

XWIKI-21071: 'Import a XAR in a wiki' REST API is not working as expected when "backup=true" and "history=REPLACE"
* fix merge

(cherry picked from commit f4e5eb21)

XWIKI-22488: Editing the paragraph using the In-place editor moves the display window to the bottom/top of the page
* Don't show the disconnect notification when leaving the page.

(cherry picked from commit 53e4ecc6)

* make the code compatible with Java 11 (easier to merge fixes in 15.10.x)

(cherry picked from commit 8b53ed9e)

* fix regression

(cherry picked from commit 56e303f2)

* fix regression
* use Java 11 compatible code (easier to merge in 15.10.x)

(cherry picked from commit 90fb91a6)

* Simplify the code by using ObjectPropertyRequiredRightAnalyzer.
* Add missing since-versions.

(cherry picked from commit f07073f1)

XWIKI-22471: Add a required rights analyzer for XWiki.Notifications.Code.NotificationEmailRendererClass

(cherry picked from commit 3d96bf3c)

XWIKI-22469: Add a required rights analyzer for XWiki.Notifications.Code.NotificationFilterDisplayerClass

(cherry picked from commit e70468d2)

* Add a required rights analyzer for XWiki.EventStream.Code.EventClass.
* Add a unit test.
* Replace duplicated string literals across classes by constants.

(cherry picked from commit 521a1343)

(cherry picked from commit 9bdeb82b)

* Add an implementation for RequiredRightAnalyzer<BaseClass>.
* Call the new analyzer in the document analyzer.
* Add a helper for analyzing wiki content in XClass definitions.
* Introduce an analyzer per property type and call the first one that
  matches.
* Add a block supplier provider that supports XClass.
* Add tests.

(cherry picked from commit 385bde98)

(cherry picked from commit 4d06d40b)

XWIKI-22488: Editing the paragraph using the In-place editor moves the display window to the bottom/top of the page
* There were two issues:
** when editing a section inplace, we were removing the tabindex attribute from the editable area too early, and since the realtime plugin puts the editable area in read-only mode while it connects to the realtime session, the focus was lost (to keep the focus the editable area needs to either be editable or have the tabindex attribute set)
** when connecting to the realtime session, the realtime plugin was displaying an information box at the top of the page and it was scrolling it into view

(cherry picked from commit 9fb3d668)

* add more tests

(cherry picked from commit d6fafbc6)

XWIKI-21071: 'Import a XAR in a wiki' REST API is not working as expected when "backup=true" and "history=REPLACE"
* codestyle

(cherry picked from commit 6baee27f)

* ignore Sonar false positive

(cherry picked from commit 494f8ec4)

* Add a simple required rights analyzer that reports admin or admin and
  maybe programming right.
* Add a unit test.

(cherry picked from commit 55c5d568)

* introduce an (internal) extensible validation system HQL queries
* introduce a new validator based on configurable regex of safe/unsafe regex patterns

(cherry picked from commit 620256c2)

(cherry picked from commit 5c11a874)

XWIKI-21071: 'Import a XAR in a wiki' REST API is not working as expected when "backup=true" and "history=REPLACE"

(cherry picked from commit 0a2d4f1c)

Currently translated at 100.0% (20 of 20 strings)

Translation: XWiki Platform/xwiki-platform-security-authentication-ui
Translate-URL: https://l10n.xwiki.org/projects/xwiki-platform/stable-15-10-x/xwiki-platform-security-authentication-ui/de/

Currently translated at 100.0% (190 of 190 strings)

Translation: XWiki Platform/xwiki-platform-appwithinminutes-ui
Translate-URL: https://l10n.xwiki.org/projects/xwiki-platform/stable-15-10-x/xwiki-platform-appwithinminutes-ui/de/

Currently translated at 100.0% (4492 of 4492 strings)

Translation: XWiki Platform/xwiki-oldcore-1510x
Translate-URL: https://l10n.xwiki.org/projects/xwiki-platform/stable-15-10-x/xwiki-oldcore-1510x/de/

XWIKI-22694: The output of Document#getExternalURL() in the PDF cover doesn't match the URL used to access XWiki
* The test coverage is lower on the old branches.

(cherry picked from commit 3b6e3e56)

Currently translated at 66.9% (188 of 281 strings)

Translation: XWiki Platform/xwiki-platform-ckeditor-ui 1
Translate-URL: https://l10n.xwiki.org/projects/xwiki-platform/stable-15-10-x/xwiki-platform-ckeditor-ui-1/fr/

Currently translated at 61.2% (172 of 281 strings)

Translation: XWiki Platform/xwiki-platform-ckeditor-ui 1
Translate-URL: https://l10n.xwiki.org/projects/xwiki-platform/stable-15-10-x/xwiki-platform-ckeditor-ui-1/fr/

Currently translated at 100.0% (6 of 6 strings)

Translation: XWiki Platform/xwiki-platform-model-validation-api-1510x
Translate-URL: https://l10n.xwiki.org/projects/xwiki-platform/stable-15-10-x/xwiki-platform-model-validation-api-1510x/fr/

XWIKI-22694: The output of Document#getExternalURL() in the PDF cover doesn't match the URL used to access XWiki
* Set the Forwarded HTTP header when opening the print preview page in the headless Chrome instance in order for the external URL to be computed properly.

(cherry picked from commit b1e5e4f4)

Currently translated at 100.0% (4 of 4 strings)

Translation: XWiki Platform/xwiki-platform-model-validation-default-1510x
Translate-URL: https://l10n.xwiki.org/projects/xwiki-platform/stable-15-10-x/xwiki-platform-model-validation-default-1510x/uk/

Currently translated at 100.0% (6 of 6 strings)

Translation: XWiki Platform/xwiki-platform-model-validation-api-1510x
Translate-URL: https://l10n.xwiki.org/projects/xwiki-platform/stable-15-10-x/xwiki-platform-model-validation-api-1510x/uk/

(cherry picked from commit b0f0e1b1)

(cherry picked from commit be1f541f)