Bootstrapify submit buttons in new artifact form

Change-Id: Ic6d45f6f276496000e651040d21b4517b9f29142
Merge commit 'refs/changes/21/1821/2' of http://gerrit.tuleap.net/tuleap into HEAD

* http://gerrit.tuleap.net/tuleap:
  Bootstrapify submit buttons in new artifact form

Change-Id: Ia1a50c3603766040166be148c4d23d3883855442
This is Tuleap 6.9.99.46

Change-Id: Ia2d3c002c71281ad3bca81f9d8db1f3b29c4e4c0