request #7088: Cannot update artifact when a field is mandatory and empty: JS error

Change-Id: I2516726e7f3195405f5b90e7d9a4dba34b2f29c4
Merge commit 'refs/changes/71/2671/1' of ssh://gerrit.tuleap.net:29418/tuleap into stable

* ssh://gerrit.tuleap.net:29418/tuleap:
  request #7088: Cannot update artifact when a field is mandatory and empty: JS error
This is Tuleap 7.1.99.53

Change-Id: Ibc7cc25c4f4a363335811b85db7ae17786957b9a