* add missing parents

* The ImportMojo should use the default Admin user to install extensions (otherwise we see "Installed by Unknown User").

* Use the diamond operator for Java 7.

* Improve the CSS

Fixed

XWIKI-11272: "Email" word is not capitalized on "Preview" livetable

XWIKI-11858: Upgrade Hibernate and DBCP Connection Provider code to work with DBCP 2.1

* remove duplicate

XCOMMONS-736: Add support for extensions categories

XWIKI-11750: Cannot configure rights for the members of a subwiki until the first member is added to the wiki.

* Add missing annotations.
* Fixing the conflict that occurs during the installation of XWiki on an empty database.

* Fix stackoverflow when having an empty user in a group

[misc] Temporarily lowered coverage ratio while the module is under refactoring/work, to avoid useless noise.

- Fixed the test again. Needed to recache the secret token after loggin in in the cleanup step.

- Added back the dependency on mail-ui for the test because it needs (at test runtime) the class document defined in mail-ui

This reverts commit 78ff9e4a.

Reverting since we created a dedicated ApplicationResource file

Conflicts:
	xwiki-platform-core/xwiki-platform-oldcore/src/main/resources/ApplicationResources.properties

- Creating own ApplicationResource file

This reverts commit 6628ce85.

Conflicts:
	xwiki-platform-core/xwiki-platform-oldcore/src/main/resources/ApplicationResources.properties

- Fixed test instance setup

- Added the current CSRF token to the confirm URL.

- Using the no wait methods in the page objects to improve the test's speed

- Using TestUtils methods to directly set and restore the email settings in the test setup instead of using the mail UI.

- Also added variations that are using the pseudoversions introduced by XWIKI-11841

XWIKI-11841: Allow specifying "latest" and "previous" pseudoversions to the /deleteversions/ and /rollback/ actions

[misc] Improve the display of the Description and Dependencies tabs from the Extension display in Flamingo skin.