Bug #5329 - modifying WYSIWYG controller to register the right file name according to the language content. (Wiring also the wysiwyg purge treatment) 

The commit of this PR must to be applied on 5.14.x version too (but not on master version).
Indeed, a PR has been specially done for the master version.

Please don't forget to check the PR https://github.com/Silverpeas/Silverpeas-setup/pull/17.