Fix request #7374: Submit bar does not appear with canned responses

The issue is that if we only choose a canned response (no field change),
then the submit bar does not appear and we cannot update the artifact.

Change-Id: I53e58e21101d89792fe8c39e3a33a60659404309
Merge commit 'refs/changes/25/2925/1' of ssh://gerrit.tuleap.net:29418/tuleap into HEAD

* ssh://gerrit.tuleap.net:29418/tuleap:
  Fix request #7374: Submit bar does not appear with canned responses

Change-Id: I933f99d450f6e93e2f2f60672a1cf5cb00294de2
This is Tuleap 7.4.99.2

Change-Id: I9bbe6a45e6ba81aba971d9cfbf7c749bcce38996