Bug #5329 - adjusting some unit test wrappers according to the recent WysiwygManager creation.
Merge branch 'bug-5329-purge-5.15.x'
fixing bug #5561
fixing bug #5399
For writers, validators must be specified to be able to update publication
fixing bug #2798
using permalink in notifications instead of internal link (autoredirect.jsp)
feature #5518 add sharing popin inside kmelia application
closing feature #5518 clean unused code
Merge branch 'feature-5518'
Bug #5569 - fixing the Web document edition in multilingual behavior
(the preview or view services was not working with content language)

Conflicts:
	kmelia/kmelia-war/src/main/java/com/stratelia/webactiv/kmelia/servlets/AjaxPublicationsListServlet.java
	rssaggregator/rssaggregator-war/src/main/java/com/silverpeas/rssAgregator/web/RSSResource.java
RESTAdapter#update function accepts now only two parameters instead of one
Fixing subscription menu UI management into the new Suggestion Box application.
fixing bug #5649
removing deleted PKs from session object
fixing bug #5615 : fixing bad absolute URL
Move the javascripts dedicated to the SuggestionBox application to the application location (in suggestionBox/jsp/javaScript)
Merge the pull request 313
Fixing a loading problem of kmelia application.
fixing NPE when updating root folder WYSIWYG directly
Merge branch 'master' of github.com:Silverpeas/Silverpeas-Components
starting feature #5515 :
- refactoring app to provide a reusable service
- creating 'News' object dedicated to this app and using Period
- removing useless code and abandoned functions (copy/paste)
- moving dedicated portlet from Core to Components
feature #5515 : thumbnail support with brand new JSP tag 'displayThumbnail'