Fix request #5551: Wrong message when adding a file in a release (IE9)

As some <p> where open and not closed, IE eventually close them
but not at the same place than other browsers.
In this case it embbeded the opening <form> but not the ending
so the mess.

Change-Id: Id5a323cb148774c7109b1b4519b66913a500ec23
Merge commit 'refs/changes/26/1626/1' of http://gerrit.tuleap.net/tuleap into HEAD

* http://gerrit.tuleap.net/tuleap:
  Fix request #5551: Wrong message when adding a file in a release (IE9)

Change-Id: I084b20c994225dde4c5258288177953a69703439
This is Tuleap 6.8.99.28

Change-Id: Ife41e6cf161624eb723d17af46fc515d1f093c4a