* Use waitUntilElementIsVisible instead of my own timeout handling.
* Try to fix the flickering with a timeout of 30sec instead of 9.

* Prevent infinite recursion by keeping a stack of documents whose titles are currently being displayed (on the current execution context).
* Also, make sure we pop the document from context only if the push is successful, otherwise we'll end up with an Execution with no ExecutionContext, which will cause lots of NPE for components that want to access the XWiki context from the ExecutionContext.

* fix regression introduced in previous commit

XWIKI-9944: The Continue button is not available on the Extensions step when all extensions are up to date

XWIKI-9942: WikiStream XAR input should fallback on XAR file instead of XML document when it can't find what is the stream type

* Maybe the timeout is too short.

- Disallow CREATOR right to public

+ fixed all pom.xml license headers which for some reasons were not noticed with previous version of the license plugin (maybe a bug that has been fixed)

* Add a method to click on Save & Continue without waiting, in order to be able to catch a save error.
* Move test from enterprise to platform

+ added some license header cleanup showing the execution on some 3 UI modules

Done.

XWIKI-9808: When renaming an extension with xwiki.extension.feature, the UI does not present the new version as an upgrade
* Check all features of an extension when looking for the installed version.

- Fix test coverage precision

- update the pom to include the new module

- new signer module

 - minor test improvement

- Fix checkstyle

XWIKI-9379: Importing a XAR that contains a document called "null" does not work

XWIKI-9579: Add a Distribution Step for showing a report of the changes brought to the wiki with full diffs
* fix typo

XWIKI-9579: Add a Distribution Step for showing a report of the changes brought to the wiki with full diffs
* fix document translation deletion (missing part)