request #5700 - Text fields are cleared when condition is unmet

Given I have an artifact with some content in a text area
And I update the artifact with a validation condition unmet (for instance workflow forbid empty field)
Then when I hit submit, I get an error and text area is empty.

Change-Id: I21e23fcbf4e24efab1a1032b8f310569ebf75d5e
Merge commit 'refs/changes/42/1542/1' of http://gerrit.tuleap.net/tuleap into HEAD

* http://gerrit.tuleap.net/tuleap:
  request #5700 - Text fields are cleared when condition is unmet

Change-Id: I3e960e21b3bfce9fb96b0a64e2db9586c2fdfe99
This is Tuleap 6.7.99.27

Change-Id: I6ad14a8dd67bde19f4aeeb19772d24acebb71e27