add duration facet and some css
Merge branch 'develop' of https://github.com/Solerni-R1-1/CoreBundle into develop

* 'develop' of https://github.com/Solerni-R1-1/CoreBundle: (21 commits)
  fix error on "A" field in message
  Refacto footer blocks on dashboard. Evaluation widget on dashboard in on specs. Duplicate or dead code removed. FFixes some others layout bugs
  Removing useless twig
  Refactoring Dashboard Widgets. Some bugfixes and old monomooc code removal
  Fix workspace deletion Set default image for mooc
  Fix NPE when creating first access rules constraint
  fix access denied in message
  fix avatar in discussion
  Fix crash in resource manager when workspace does not have a mooc
  Added default picture for mooc and moocowner to prevent crash
  Fix claroline bug on platform badges
  Added fallback image for not found / corrupted images
  fix 403 infinite loop
  change design fix error 500 add tmp ico for restore
  remove button "send email"
  Fix badge page when pageContext is null
  Fix mooc no owner in mooc administration page
  fixbug on administration page
  My_badges page is multimooc. Some refacto on dashboard. Bugfixes
  fix url cgu
  ...