Allow one to filter cards on cardwall

Change-Id: Ieb65b2898e780a6d4db6603b9f35b0b50996a0b0
Merge commit 'refs/changes/04/404/3' of http://gerrit.tuleap.net/tuleap into stable

* http://gerrit.tuleap.net/tuleap:
  Allow one to filter cards on cardwall
This is Tuleap 5.12.99.52