tasks #6625: Submit bar instead of submit buttons

Change-Id: I5b47eb6114f3e369638373f510d847f8d6b7b690
Merge commit 'refs/changes/49/2249/10' of http://gerrit.tuleap.net/tuleap into HEAD

* http://gerrit.tuleap.net/tuleap:
  tasks #6625: Submit bar instead of submit buttons

Change-Id: Ib75de7fb89f1f85b3525f51ee885232de6121638
This is Tuleap 6.12.99.29

Change-Id: Ie367e1cd2d8455f1e2d11f50a3558b47d27ed3f8