* Fix usage of deprecated EditModeClass object.

XWIKI-13733: Installation via apt get of XWiki Enterprise does not select CKEditor as default editor

* Fix cyclic dep

* moved to https://github.com/xwiki-contrib/ldap

* Use the PureText editor for TextArea properties that don't support wiki syntax. Note that the XWikiPreferencesDocumentInitializer is already updated, but it only takes care of adding the property if it's missing (thus the editor meta property is not updated).

* Fix the GWT WYSIWYG editor template.
* Bundle the edit module in the default distribution
* Bundle the edit module implementation in the package created by the pacakger plugin.

- Removing the Main.Welcome page and its translations pages
- Removing Main.WelcomeSheet that allowed rapid editing of the Welcome
gadget

- Fixing DefaultValidationTest.testDocumentValidity web standard test

- Adding Platform - Application - UI dependency in Platform
Distribution Flavor

- Changed syntax version to 2.1
- Fixing the EM link. Thanks @acotiuga

- Adding a nested SupportPanel that contains a translatable Content page
- Adding the Support panel to Preferences

- Replacing the Dashboard include with help content
- Adding a SSX to style the used table
- Remove the translation key from title since the whole page will be
internationalised
- Changing the Homepage Layout according to the vote: adding the
Navigation panel

- Applying xar:format

* Fix deprecated usages in XWikiPreferences.xml pages