fixbug 403 blank page
Merge branch 'develop' of https://github.com/Solerni-R1-1/CoreBundle into develop

* 'develop' of https://github.com/Solerni-R1-1/CoreBundle:
  Accessibility to admin page "Moocs" added to ROLE_WS_CREATOR
  fix Design for slider in dashboard when the loading of the page
  Clean previous commit...
  Fix incoherent alert in dragndrop of resource manager
  Fixbug on Mooc Presentation
  Fixbugs. Page Presentation Mooc complete. Activation of localizeddate twig extension.
  Tab "discuter" is now selected when inside theme / subject / message in forum
  avoid FB users to reset / modif their passwd
  Fix bug in forum when no session is active
  Prevent blank page when trying to access tools while not having rights
  A MoocSession is stored in user php session for each Mooc
  Fix certificationType can not be null error when creating a new mooc